-3(x-1)+7x=31

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Solution for -3(x-1)+7x=31 equation: 



-3(x-1)+7x=31

We move all terms to the left:

-3(x-1)+7x-(31)=0

We add all the numbers together, and all the variables

7x-3(x-1)-31=0

We multiply parentheses

7x-3x+3-31=0

We add all the numbers together, and all the variables

4x-28=0

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

4x=28

x=28/4

x=7

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