a-3+4a=3(3a-9)

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



a-3+4a=3(3a-9)

We move all terms to the left:

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

We add all the numbers together, and all the variables

5a-(3(3a-9))-3=0



We calculate terms in parentheses: -(3(3a-9)), so:

3(3a-9)

We multiply parentheses

9a-27

Back to the equation:

-(9a-27)



We get rid of parentheses

5a-9a+27-3=0

We add all the numbers together, and all the variables

-4a+24=0

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

-4a=-24

a=-24/-4

a=+6

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