7a+13=-3(3-4a)+2

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Solution for 7a+13=-3(3-4a)+2 equation: 



7a+13=-3(3-4a)+2

We move all terms to the left:

7a+13-(-3(3-4a)+2)=0

We add all the numbers together, and all the variables

7a-(-3(-4a+3)+2)+13=0



We calculate terms in parentheses: -(-3(-4a+3)+2), so:

-3(-4a+3)+2

We multiply parentheses

12a-9+2

We add all the numbers together, and all the variables

12a-7

Back to the equation:

-(12a-7)



We get rid of parentheses

7a-12a+7+13=0

We add all the numbers together, and all the variables

-5a+20=0

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

-5a=-20

a=-20/-5

a=+4

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