3x-2y=8① 2y+3z=1②x+5y-z=-4③解
heng_heng2022-10-04 11:39:541条回答
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桃之夭夭哦 共回答了21个问题 |采纳率85.7%- 3x-2y=8① 2y+3z=1②x+5y-z=-4③
③×3-①：17y-3z=-20④
④+②：19y=-19,∴y=-1
y=-1代入①：x=2
y=-1代入②：z=1
所以x=2,y=-1,z=1 - 1年前
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