31=2(x-7)+7x

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Solution for 31=2(x-7)+7x equation: 



31=2(x-7)+7x

We move all terms to the left:

31-(2(x-7)+7x)=0



We calculate terms in parentheses: -(2(x-7)+7x), so:

2(x-7)+7x

We add all the numbers together, and all the variables

7x+2(x-7)

We multiply parentheses

7x+2x-14

We add all the numbers together, and all the variables

9x-14

Back to the equation:

-(9x-14)



We get rid of parentheses

-9x+14+31=0

We add all the numbers together, and all the variables

-9x+45=0

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

-9x=-45

x=-45/-9

x=+5

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