-2a+7-3(-9-4a)=0

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Solution for -2a+7-3(-9-4a)=0 equation: 



-2a+7-3(-9-4a)=0

We add all the numbers together, and all the variables

-2a-3(-4a-9)+7=0

We multiply parentheses

-2a+12a+27+7=0

We add all the numbers together, and all the variables

10a+34=0

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

10a=-34

a=-34/10

a=-3+2/5

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