-81=-7(x+3)-4

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Solution for -81=-7(x+3)-4 equation: 



-81=-7(x+3)-4

We move all terms to the left:

-81-(-7(x+3)-4)=0



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

-7(x+3)-4

We multiply parentheses

-7x-21-4

We add all the numbers together, and all the variables

-7x-25

Back to the equation:

-(-7x-25)



We get rid of parentheses

7x+25-81=0

We add all the numbers together, and all the variables

7x-56=0

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

7x=56

x=56/7

x=8

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