7(-2a-3)=91

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Solution for 7(-2a-3)=91 equation: 



7(-2a-3)=91

We move all terms to the left:

7(-2a-3)-(91)=0

We multiply parentheses

-14a-21-91=0

We add all the numbers together, and all the variables

-14a-112=0

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

-14a=112

a=112/-14

a=-8

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