13a+7=3(3a+3)-10

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Solution for 13a+7=3(3a+3)-10 equation: 



13a+7=3(3a+3)-10

We move all terms to the left:

13a+7-(3(3a+3)-10)=0



We calculate terms in parentheses: -(3(3a+3)-10), so:

3(3a+3)-10

We multiply parentheses

9a+9-10

We add all the numbers together, and all the variables

9a-1

Back to the equation:

-(9a-1)



We get rid of parentheses

13a-9a+1+7=0

We add all the numbers together, and all the variables

4a+8=0

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

4a=-8

a=-8/4

a=-2

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