解方程3(x-12-10)=x-10

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解方程3(x-12-10)=x-10
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解方程3(x-12-10)=x-10
解方程3(x-12-10)=x-10

解方程3(x-12-10)=x-10
3x-36-30=x-10
2x=56
x=28

3(x-22)=x-10
3x-66=x-10
2x=56
x=28

X=28