81=-7(a-6)-3

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Solution for 81=-7(a-6)-3 equation: 



81=-7(a-6)-3

We move all terms to the left:

81-(-7(a-6)-3)=0



We calculate terms in parentheses: -(-7(a-6)-3), so:

-7(a-6)-3

We multiply parentheses

-7a+42-3

We add all the numbers together, and all the variables

-7a+39

Back to the equation:

-(-7a+39)



We get rid of parentheses

7a-39+81=0

We add all the numbers together, and all the variables

7a+42=0

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

7a=-42

a=-42/7

a=-6

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