-83=-6(1-7a)+7

Solution for -83=-6(1-7a)+7 equation:

-83=-6(1-7a)+7

We move all terms to the left:

-83-(-6(1-7a)+7)=0

We add all the numbers together, and all the variables

-(-6(-7a+1)+7)-83=0


We calculate terms in parentheses: -(-6(-7a+1)+7), so:

-6(-7a+1)+7

We multiply parentheses

42a-6+7

We add all the numbers together, and all the variables

42a+1

Back to the equation:

-(42a+1)


We get rid of parentheses

-42a-1-83=0

We add all the numbers together, and all the variables

-42a-84=0

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

-42a=84

a=84/-42

a=-2