-7(a-1)-2a=28

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Solution for -7(a-1)-2a=28 equation: 



-7(a-1)-2a=28

We move all terms to the left:

-7(a-1)-2a-(28)=0

We add all the numbers together, and all the variables

-2a-7(a-1)-28=0

We multiply parentheses

-2a-7a+7-28=0

We add all the numbers together, and all the variables

-9a-21=0

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

-9a=21

a=21/-9

a=-2+1/3

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