3(-2+4a)=-90

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Solution for 3(-2+4a)=-90 equation: 



3(-2+4a)=-90

We move all terms to the left:

3(-2+4a)-(-90)=0

We add all the numbers together, and all the variables

3(4a-2)-(-90)=0

We add all the numbers together, and all the variables

3(4a-2)+90=0

We multiply parentheses

12a-6+90=0

We add all the numbers together, and all the variables

12a+84=0

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

12a=-84

a=-84/12

a=-7

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