(30-5a+3a)+3a+7a-1)=-3

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Solution for (30-5a+3a)+3a+7a-1)=-3 equation: 



(30-5a+3a)+3a+7a-1)=-3

We move all terms to the left:

(30-5a+3a)+3a+7a-1)-(-3)=0

We add all the numbers together, and all the variables

(-2a+30)+3a+7a-1)-(-3)=0

We add all the numbers together, and all the variables

10a+(-2a+30)=0

We get rid of parentheses

10a-2a+30=0

We add all the numbers together, and all the variables

8a+30=0

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

8a=-30

a=-30/8

a=-3+3/4

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