7a=(3a-9)

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



7a=(3a-9)

We move all terms to the left:

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



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

(3a-9)

We get rid of parentheses

3a-9

Back to the equation:

-(3a-9)



We get rid of parentheses

7a-3a+9=0

We add all the numbers together, and all the variables

4a+9=0

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

4a=-9

a=-9/4

a=-2+1/4

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