-7(1+7a)=91

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Solution for -7(1+7a)=91 equation: 



-7(1+7a)=91

We move all terms to the left:

-7(1+7a)-(91)=0

We add all the numbers together, and all the variables

-7(7a+1)-91=0

We multiply parentheses

-49a-7-91=0

We add all the numbers together, and all the variables

-49a-98=0

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

-49a=98

a=98/-49

a=-2

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