3(-5a-7)-a=39-6a

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Solution for 3(-5a-7)-a=39-6a equation: 



3(-5a-7)-a=39-6a

We move all terms to the left:

3(-5a-7)-a-(39-6a)=0

We add all the numbers together, and all the variables

3(-5a-7)-a-(-6a+39)=0

We add all the numbers together, and all the variables

-1a+3(-5a-7)-(-6a+39)=0

We multiply parentheses

-1a-15a-(-6a+39)-21=0

We get rid of parentheses

-1a-15a+6a-39-21=0

We add all the numbers together, and all the variables

-10a-60=0

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

-10a=60

a=60/-10

a=-6

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