55=-8(6+a)+7

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Solution for 55=-8(6+a)+7 equation: 



55=-8(6+a)+7

We move all terms to the left:

55-(-8(6+a)+7)=0

We add all the numbers together, and all the variables

-(-8(a+6)+7)+55=0



We calculate terms in parentheses: -(-8(a+6)+7), so:

-8(a+6)+7

We multiply parentheses

-8a-48+7

We add all the numbers together, and all the variables

-8a-41

Back to the equation:

-(-8a-41)



We get rid of parentheses

8a+41+55=0

We add all the numbers together, and all the variables

8a+96=0

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

8a=-96

a=-96/8

a=-12

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