3a-3(7+5a)=-9(2a)

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Solution for 3a-3(7+5a)=-9(2a) equation: 



3a-3(7+5a)=-9(2a)

We move all terms to the left:

3a-3(7+5a)-(-9(2a))=0

We add all the numbers together, and all the variables

3a-3(5a+7)-(-92a)=0

We multiply parentheses

3a-15a-(-92a)-21=0

We get rid of parentheses

3a-15a+92a-21=0

We add all the numbers together, and all the variables

80a-21=0

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

80a=21

a=21/80

a=21/80

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