x-y=2,x+y=-3则x=?y=?
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x-y=2,x+y=-3则x=?y=?
x-y=2,x+y=-3则x=?y=?
x-y=2,x+y=-3则x=?y=?
x=-1/2
y=-5/2
x-y=2,x+y=-3则x=-1/2
y=-5/2
有不懂可追问,望采纳
x=-1/2 y = -5/2
x-y=2,x+y=-3则x=-1/2
y=-5/2
x=-0.5,
y=-2.5
x-y=2,------(1)
x+y=-3------(2)
由(1)+(2)得
2x=-1
x=-0.5
把x=-0.5代人(1)得
y=-2.5
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