-7=3a+4(a+7)

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Solution for -7=3a+4(a+7) equation: 



-7=3a+4(a+7)

We move all terms to the left:

-7-(3a+4(a+7))=0



We calculate terms in parentheses: -(3a+4(a+7)), so:

3a+4(a+7)

We multiply parentheses

3a+4a+28

We add all the numbers together, and all the variables

7a+28

Back to the equation:

-(7a+28)



We get rid of parentheses

-7a-28-7=0

We add all the numbers together, and all the variables

-7a-35=0

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

-7a=35

a=35/-7

a=-5

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