3(3a-6)=-90

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Solution for 3(3a-6)=-90 equation: 



3(3a-6)=-90

We move all terms to the left:

3(3a-6)-(-90)=0

We add all the numbers together, and all the variables

3(3a-6)+90=0

We multiply parentheses

9a-18+90=0

We add all the numbers together, and all the variables

9a+72=0

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

9a=-72

a=-72/9

a=-8

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