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解方程:y-(y+1)/2=2-(y+2)/510y-5y-5=20-2y-4y=32.解方程:1/2(2x+5)=4x+3/4-2-3x/8 ;4(2x+5)=32x+6-16-3x8x+20=29x-1021x=30x=10/7
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