3(a+1)=9(a-4)

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Solution for 3(a+1)=9(a-4) equation: 



3(a+1)=9(a-4)

We move all terms to the left:

3(a+1)-(9(a-4))=0

We multiply parentheses

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



We calculate terms in parentheses: -(9(a-4)), so:

9(a-4)

We multiply parentheses

9a-36

Back to the equation:

-(9a-36)



We get rid of parentheses

3a-9a+36+3=0

We add all the numbers together, and all the variables

-6a+39=0

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

-6a=-39

a=-39/-6

a=6+1/2

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