已知|x+y-2|+(2x-3y+6)²=0,求x,y的值.
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已知|x+y-2|+(2x-3y+6)²=0,求x,y的值.已知|x+y-2|+(2x-3y+6)²=0,求x,y的值.已知|x+y-2|+(2x-3y+6)²=0,求x
已知|x+y-2|+(2x-3y+6)²=0,求x,y的值.
已知|x+y-2|+(2x-3y+6)²=0,求x,y的值.
已知|x+y-2|+(2x-3y+6)²=0,求x,y的值.
已知:2x+y=6,x-3y=1 求7y(x-3y)(x-3y)-2(3y-x)(3y-x)
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已知方程组2x+y=6 x-3y=1,求7y(x-3y)²-2(3y-x)³的值
已知2x+y=6,x-3y=1,求7y(x-3y)-2(3y-x)的值.
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