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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

3x+7x-49-31=0

We add all the numbers together, and all the variables

10x-80=0

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

10x=80

x=80/10

x=8

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