7(a-7)=-91

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Solution for 7(a-7)=-91 equation: 



7(a-7)=-91

We move all terms to the left:

7(a-7)-(-91)=0

We add all the numbers together, and all the variables

7(a-7)+91=0

We multiply parentheses

7a-49+91=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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