方程:1-2(x-2)=3(5-2x)
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方程:1-2(x-2)=3(5-2x)
方程:1-2(x-2)=3(5-2x)
方程:1-2(x-2)=3(5-2x)
1-2x+4=15-10x
x=2.5
x=5/2
1-2x+4=15-10x
-2x+10x=15-1-4
8x=10
x=10÷8
x=1.25