x/3+(100-x)*2=100解方程x/3+(100-x)*2=100 2(x-3)+3(2x-1)=5(x+3) 7-x/4=x-3 4(x+5)=2-3(2x-7) 3(x+13)-5(1-x)=13(x-1) 3(x-2)=2-5(x-2) 3(x+1)-2(x+2)=2x-3 3(x-2)+1=x-(2x-1) x/2=3x-1 3/4x-0.4=1/2x+0.3 3-1.2x=4/5x-12 1/2(x-3)=2-1/2(x-3) 4(2x-1)-2(x-1)=22 5

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