3(4+3a)=6-21a

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Solution for 3(4+3a)=6-21a equation: 



3(4+3a)=6-21a

We move all terms to the left:

3(4+3a)-(6-21a)=0

We add all the numbers together, and all the variables

3(3a+4)-(-21a+6)=0

We multiply parentheses

9a-(-21a+6)+12=0

We get rid of parentheses

9a+21a-6+12=0

We add all the numbers together, and all the variables

30a+6=0

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

30a=-6

a=-6/30

a=-1/5

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