7a-4(-4a+2)=84

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Solution for 7a-4(-4a+2)=84 equation: 



7a-4(-4a+2)=84

We move all terms to the left:

7a-4(-4a+2)-(84)=0

We multiply parentheses

7a+16a-8-84=0

We add all the numbers together, and all the variables

23a-92=0

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

23a=92

a=92/23

a=4

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