3(x-4)-(x-7)=20

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Solution for 3(x-4)-(x-7)=20 equation: 



3(x-4)-(x-7)=20

We move all terms to the left:

3(x-4)-(x-7)-(20)=0

We multiply parentheses

3x-(x-7)-12-20=0

We get rid of parentheses

3x-x+7-12-20=0

We add all the numbers together, and all the variables

2x-25=0

We move all terms containing x to the left, all other terms to the right

2x=25

x=25/2

x=12+1/2

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