五年前姐姐的年龄是妹妹的4倍今年姐妹俩和是40岁姐姐今年多少岁 用方程做

冰封的心,渐渐融化,温暖的阳光照耀在五年前的一天------五彩缤纷的城市.猫眼中的路,亮晶晶的.路旁的灯,柔柔的照着.路中的喷泉,包裹在车流中.
磨盘似的明月,镶在夜空.一边走着,似乎路旁有课扶柳,穿着融融的柳絮.猫儿过去了,无意中回头一看.------她穿着柳絮,散着秀发,向着我舞蹈.

I was just a kid knowing nothing five years ago.

设今年小明X岁
则五年前他X－5岁,今年爸爸4x岁,五年前爸爸4X－5岁
则1／7（4X－5）＝X－5
则X＝10
所以今年小明10岁

was
不明白的再问哟,请及时采纳,多谢!

Will people own robots in the future?

如果不考虑存款利息税,到期可得利息：
200×4.88%×5 = 48.80（元）
本息合计：248.80元
他取出的钱应该够买一台价值230的英语复读机了.

1 five years ago,my English is very bad
2 he came home late last night from
3 in the past few decades,great changes have taken place in people's way of communication

dear carl
i am glad to receive your email.it has been five years since you visited my hometown before.so i will tell you the changes taken place in my hometown as you wish.
our hometown has witnessed great development.numbers of tall buildings have been built up and the roads are clearer than ever before.what is more ,people here are more aware of the responsibility of being a good citizen.
i am pleased with all the differences in my hometown .and i hope you can visit my hometown again ,and feel the changes yourself!
yours
lihua

35岁

I studied in the No.six Middle School five years ago.
When did they leave Shanghai?
They moved to Xi'an last autumn.
She wasn't at home last night,right?
We didn't go to the cinema last week.

五年前我就认识他,但并不了解他
I ( knew ) him five years ago ,but l don't ( know about ) him.
加油!不明白再问!

2000+2000乘以4.89乘以50900

Five years ago,my sister in the high school!

选B,看这篇作文http://www.***.cn/StuU/pullulateSpace/writing/zw_detail_p00.aspx?wri_id=105818

我的变化
每个人都在变化.
五年前,我11岁,我长着长头发,我曾经很喜欢画画,只要一有空就会画画.
现在,我16岁了,我长着短头发,我喜欢听音乐,那样可以放松心情.
这就是我的改变.
How I have changed.
Everyone is changing.
Five years ago,I was eleven years old,with long hair.I loved drawing,and would draw whenever I had free time.
Now,I am sixteen years old,with short hair.I enjoy listening to music,as it helps me relax.
This is how I have changed.
o(∩_∩)o

解题思路：甲乙二人的年龄差是15岁，因为年龄差不会随着时间的变化而改变，由此先利用和倍公式求出乙5年前的年龄，即可解决问题．

5年前乙是：
15÷（2-1）=15（岁），
15+5=20（岁），
答：乙现在20岁．

点评：
本题考点： 年龄问题．

考点点评： 解答此题的关键是，根据两人的年龄差不会随着时间的改变而变化，利用差倍公式先求出乙相5年前的年龄，由此解决问题．

解题思路：由“今年小明与爸爸年龄的比是2：9”，根据实际情况可知：今年爸爸可能是27、36、45、54、63、72…；小明可能是6、8、10、12、14、16、18…；如果今年爸爸27岁，小明6岁，那么5年前小明与爸爸的年龄比是1：22；如果今年爸爸36岁，小明8岁，那么5年前小明与爸爸的年龄比大约是1：10；如果今年爸爸45岁，小明10岁，那么5年前小明与爸爸的年龄比是1：8；如果今年爸爸54岁，小明12岁，那么5年前小明与爸爸的年龄比是1：7；如果今年爸爸63岁，小明14岁，那么5年前小明与爸爸的年龄比大约是1：6；如果今年爸爸72岁，小明16岁，那么5年前小明与爸爸的年龄比大约是1：6；据此选择A．

根据分析，可知：
今年小明与爸爸年龄的比是2：9．五年前，小明与爸爸的年龄比可能是1：6；
故选：A．

点评：
本题考点： 比的意义；年龄问题．

考点点评： 解决此题关键是根据小明与爸爸年龄的比是2：9，推出符合生活实际的年龄，进而再推出5年前他们的年龄，再写出比即可；要注意：两个人的年龄差是一个不变的数，而年龄比是变化的．

five years ago ,i'm nine years old .i played tabble tennis everyday ,i thought it's very interesting .and today,i'm older than before .i play basketball now .and i have a pet dog.in five years .i'm a university student.i will play tennis with my best friend xxx .maybe,i will have a boyfriend(或者是girlfriend).in five years,i will be better now.but if i have to work hard,i'll be for the five year's dream to study hard.

Liu lived in a small village five years ago, when a pupil, means of transport is walking to school. Life is very simple. Now he lives in town, a middle school, take the bus to school. Twenty years later, he wanted to live in Beijing, do scientists, driving their own cars to work.

54/120*100%=45%
68/200*100%=34%
下降了9个百分点,显著减少了

五年前上海人均绿地面积
12.5÷（1+36.5%）
=12.5÷1.365
≈9.18（平方米）

用方程解决吧 设哥哥年龄是X弟弟年龄是Y
那么3年后 年龄差距X－Y＝5 X＋Y＝（X－Y）X3
X＝Y＋5 带入公式得出 X＝10 Y＝5 那3年前他们的年龄就是哥哥7弟弟2

设弟弟今年 x岁
x+3+x+5+3=3*5
x=2
哥哥：2+5=7

设小红今年的年龄为x岁,则妈妈的年龄为2.5x岁.
（x+5）+（2.5x+5）=52
x+5+2.5x+5=52
3.5x=52-10
3.5x=42
x=12
2.5x=30
答：小红今年的年龄为12岁,妈妈今年的年龄为30岁

设小红今年X妈妈Y,得出X+Y-10=52,小红现在是妈妈的一半得出Y=2X,带入,3X-10=52,条件有误请重试.

设小英为x,小华为y,则
(x-5) (y-5)=20
(y 10)-(x 10 )=6
解得x=12 , y=18

哥哥五年前的年龄和妹妹三年后的年龄相同,当哥哥几岁时正好是妹妹年龄的三倍?
（5+3）/（3-1）
＝8/2
＝4（岁） 4*3＝12（岁）
答：当哥哥12岁时是妹妹的3倍.
分析：
根据你给出的问题补充哥哥比妹妹大八岁,所以我们得出这是一道差倍问题.
差倍问题的公式是：差/（倍数-1）＝1倍数（最小的数量）
在这里,差是8,倍数是3.那么列式是（5+3）/（3-1）＝4（岁）
最后用4*3＝12（岁）
答：是12岁时!

设现在乙岁数是X,则甲的年龄是X+15
五年前有：
X+15-5=2*(X-5)成立
得X=20（岁）

1、哪家电影院离你们学校最近.
Which is the closest cinema to your school?
2、五年前兰伯特先生开始从事英语教学工作.
Mr.Lambert started English teaching fives years ago.
3、他有足够的钱买一辆汽车.
He has enough money to afford a car.
4、离开房间时请不要忘记关灯.
Please don't forget to turn off the lights when leaving the room.
5、让我们为新英语老师开个欢迎会吧.
Let's hold/throw a welcome party to our new English teacher.
6、托尼和琳达同时加入了拿家俱乐部.
Tony and Linda joined the club at the same time.
7、They are going to fly kites Saturday morning（改为一般疑问句）
__Are____ __they____ __going___ to fly kites this Saturday morning?
8、I'm going to do more reading this term.对do more reading提问.
___What___ ___are____ ___you___ going to __do____ this term?
9、I think Tom is the youngest student（改为否定句）
I __don't__ ___think__ Tom __is__ the youngest student.
10、The room is about $30 a night对 sbout $30提问.
How much is the room for a night?
11、Maria is going to work in Paris对in Paris提问.
___Where__ __is___ Maria going to work?
12、I had four cakes for breakfast this morning.对 four提问.
__How___ __many___ cakes __did___ you __have___ for breakfast this morning?


1、Which __cinema__ ____ is the __closest__ __to__ your school?
2、Mr Lambert __started__ __his__ English teaching five years ago.
4、 __Don't __ _forget___ __to___ turn off the lights when you leave the room.
5、Let's __hold__ _a____ _welcome____ _party___ for our new English teacher.
6、Tony and Linda ___joined__ the club __at__ _the_____ __same___ __time____ .




不明白可继续提问.
若回答对您有所帮助,请点击本页面中的“选为满意回答”按钮.

设妈妈现在为Y岁,小红为X岁
则{Y-5=（X-5）
{Y=3X
小红为10岁.

家里五年前年所有人年龄的总和=77-5*4=57岁
但是实际五年前家里四个人年龄总和=58岁
爸爸和妈妈,小明的年龄肯定不会减少.故只有可能是妹妹的年龄减少了,所以就可以想到妹妹五年前没有出生,是四年前出生的,故 妹妹的年龄=4岁,小明的年龄=6岁,
由于 爸的年龄+妈的年龄+小明的年龄+妹妹的年龄=77,
所以 爸的年龄+妈的年龄=77-6-4=67岁,爸的年龄-妈的年龄=3,
故爸的年龄=（爸的年龄+妈的年龄+3）/2=35岁,妈的年龄=35-3=32岁

哥哥20,弟弟10 M=1.5 518

今年明明x岁,则妹妹x-6岁
5年前,明明x-5岁,妹妹x-6-5=x-11岁
∴x-5=2（x-11）
∴x=17
即今年明明17岁

设哥哥的年龄为x,弟弟的年龄为y
x-5=y+7
x+4+y-3=35;
x-y=12,x=12+y
x+y=34,x=34-y;
12+y=34-y,2y=22,y=11,x=23
所以哥哥今年23岁,弟弟11岁.

About five years ago ,I was just a childish boy/girl,doing whatever I like to do,without thinking of others thoughts or benefits.Now i have grown up to a independent boy/girl,trying to be nice and responsible.Five years later,I think I would be mature enough.Through harding working,I would have a comfortable life,as well as a good career then.

设弟弟5年前为x岁 姐姐为2x
现在 2x+5=1.5（x+5）
2x+5=1.5x+7.5
0.5x=2.5
x=5
2x+5
=10+5
15（岁）
答：

兄17岁弟7岁

where do you live five years befo

小胖16岁,妈妈40岁.
设5年前小胖X岁,则妈妈五年前24+X岁.五年后小胖X+5岁,妈妈24+X+5岁.则
（X+5）× 4 －24=24+X+5
得 X=11,即五年前小胖11岁
那么五年后16岁.妈妈40岁.

2x+3x+7x=144 x=12 a= x*12=24 b=36 c= 84
x-y=15
x-5=2y
x=25
y=10

5 年前,父亲年龄是儿子的 15 倍,这样显然就是 30：2,15 年后,父亲年龄变成儿子的 2 倍多 6,其实,这是过了 20年,父子年龄比就是( 30 + 20 )：( 2 + 20 ) = 50：22,50 = 6 + 44 = 6 + 22 X 2回到今年,父子年龄就是( 30...

There are many differences between the school yard of this year and that of five years ago.First,with the rapid development of the country's economy,the school yards are much more modern.A large amount of media and experiment equipment is put into use,which makes the teaching more lively and practical.Second,the teachers are much more professional than before.The schools demand that the teachers should have higher degree.Third,the school yards are well built these years.The buildings are becoming more beautiful which include many new labs,such as musical studios,biology labs,physics labs and so on.The students can study in these rooms where they will study with great interest.
简单的写了一个,因为不知道你需要什么样的,如果有什么特定的写作方向的话写起来就更加容易

I lived in Beijing five years ago.

儿子的年龄：（52-5+5×6）÷（6+1）=11（岁）
妈妈的年龄：52-11=41（岁）

About five years ago , I was just a childish boy/girl, doing whatever I like to do, without thinking of others thoughts or benefits. Now i have grown up to a independent boy/girl, trying to be nice and responsible. Five years later, I think I would be mature enough. Through harding working, I would have a comfortable life, as well as a good career then.

1 sun rise in east.
2 the moon moves around the earth.
3 he make a speech at the meeting yesterday.
4 your brother has already returned.
5 i intend to come by train.
6 i lived in shanghai 5 years ago.

设妹妹X岁,哥哥X+5岁,五年前列式为x-5/x=1/2,解得x=10

我觉得用一种感慨、悲凉的感情去阅读合适.

（12-5）X9+5=68