已知|2x-1+3y|+|3x+6-2y|=0则x+y=
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已知|2x-1+3y|+|3x+6-2y|=0则x+y=
已知|2x-1+3y|+|3x+6-2y|=0则x+y=
已知|2x-1+3y|+|3x+6-2y|=0则x+y=
绝对值大于等于0,相加等于0
若有一个大于0,则另一个小于0,不成立.
所以两个都等于0
所以2x-1+3y=0 (1)
3x+6-2y=0 (2)
(1)×5+(2)
13x+13y+1=0
13x+13y=-1
x+y=-1/13
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