-31+8a=3(7+7a)

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Solution for -31+8a=3(7+7a) equation: 



-31+8a=3(7+7a)

We move all terms to the left:

-31+8a-(3(7+7a))=0

We add all the numbers together, and all the variables

8a-(3(7a+7))-31=0



We calculate terms in parentheses: -(3(7a+7)), so:

3(7a+7)

We multiply parentheses

21a+21

Back to the equation:

-(21a+21)



We get rid of parentheses

8a-21a-21-31=0

We add all the numbers together, and all the variables

-13a-52=0

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

-13a=52

a=52/-13

a=-4

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