-84=-4(a+2)

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Solution for -84=-4(a+2) equation: 



-84=-4(a+2)

We move all terms to the left:

-84-(-4(a+2))=0



We calculate terms in parentheses: -(-4(a+2)), so:

-4(a+2)

We multiply parentheses

-4a-8

Back to the equation:

-(-4a-8)



We get rid of parentheses

4a+8-84=0

We add all the numbers together, and all the variables

4a-76=0

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

4a=76

a=76/4

a=19

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