-39=-3(5+a)

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Solution for -39=-3(5+a) equation: 



-39=-3(5+a)

We move all terms to the left:

-39-(-3(5+a))=0

We add all the numbers together, and all the variables

-(-3(a+5))-39=0



We calculate terms in parentheses: -(-3(a+5)), so:

-3(a+5)

We multiply parentheses

-3a-15

Back to the equation:

-(-3a-15)



We get rid of parentheses

3a+15-39=0

We add all the numbers together, and all the variables

3a-24=0

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

3a=24

a=24/3

a=8

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