7a-8=-3(a-4)

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Solution for 7a-8=-3(a-4) equation: 



7a-8=-3(a-4)

We move all terms to the left:

7a-8-(-3(a-4))=0



We calculate terms in parentheses: -(-3(a-4)), so:

-3(a-4)

We multiply parentheses

-3a+12

Back to the equation:

-(-3a+12)



We get rid of parentheses

7a+3a-12-8=0

We add all the numbers together, and all the variables

10a-20=0

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

10a=20

a=20/10

a=2

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