解x+y+z=7 x+2y+2z=12 x-y-z=-3
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解x+y+z=7①x+2y+2z=12②x-y-z=-3③①+③2x=7-32x=4X=2
咨询记录 · 回答于2022-11-30
x-y-z=-3
x-y-z=-3
x+2y+2z=12
解x+y+z=7
解x,y,z
过程也要
x+2y+2z=12
解x+y+z=7
x-y-z=-3
x+2y+2z=12
解x+y+z=7
x-y-z=-3
x+2y+2z=12
解x+y+z=7
x-y-z=-3
x+2y+2z=12
解x+y+z=7
x-y-z=-3
x+2y+2z=12
解x+y+z=7
x-y-z=-3
x+2y+2z=12
解x+y+z=7
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