7a-4=3(a+9)

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



7a-4=3(a+9)

We move all terms to the left:

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



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

3(a+9)

We multiply parentheses

3a+27

Back to the equation:

-(3a+27)



We get rid of parentheses

7a-3a-27-4=0

We add all the numbers together, and all the variables

4a-31=0

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

4a=31

a=31/4

a=7+3/4

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