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1、3x-4/2=x-6、 3x-2=x-6 2x=-4 x=-2 2、2(3x-4)+7(4-x)=4x 6x-8+28-7x=4x(移項) 20=4x+7x-6x 5x=20 x=4 3、y+2/4-2y-3/6=1 y+1/2-2y-1/2=1 -y=1 y=-1
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