-5(3+7a)-7a=3a+7(7-9)

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Solution for -5(3+7a)-7a=3a+7(7-9) equation: 



-5(3+7a)-7a=3a+7(7-9)

We move all terms to the left:

-5(3+7a)-7a-(3a+7(7-9))=0

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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

We multiply parentheses

-7a-35a-(3a+7(-2))-15=0



We calculate terms in parentheses: -(3a+7(-2)), so:

3a+7(-2)

We add all the numbers together, and all the variables

3a-14

Back to the equation:

-(3a-14)



We add all the numbers together, and all the variables

-42a-(3a-14)-15=0

We get rid of parentheses

-42a-3a+14-15=0

We add all the numbers together, and all the variables

-45a-1=0

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

-45a=1

a=1/-45

a=-1/45

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