6a-8a=-5(1-4a)-3(-7+7a)

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Solution for 6a-8a=-5(1-4a)-3(-7+7a) equation: 



6a-8a=-5(1-4a)-3(-7+7a)

We move all terms to the left:

6a-8a-(-5(1-4a)-3(-7+7a))=0

We add all the numbers together, and all the variables

6a-8a-(-5(-4a+1)-3(7a-7))=0

We add all the numbers together, and all the variables

-2a-(-5(-4a+1)-3(7a-7))=0



We calculate terms in parentheses: -(-5(-4a+1)-3(7a-7)), so:

-5(-4a+1)-3(7a-7)

We multiply parentheses

20a-21a-5+21

We add all the numbers together, and all the variables

-1a+16

Back to the equation:

-(-1a+16)



We get rid of parentheses

-2a+1a-16=0

We add all the numbers together, and all the variables

-1a-16=0

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

-a=16

a=16/-1

a=-16

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