9a+30=3(4a-20)

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Solution for 9a+30=3(4a-20) equation: 



9a+30=3(4a-20)

We move all terms to the left:

9a+30-(3(4a-20))=0



We calculate terms in parentheses: -(3(4a-20)), so:

3(4a-20)

We multiply parentheses

12a-60

Back to the equation:

-(12a-60)



We get rid of parentheses

9a-12a+60+30=0

We add all the numbers together, and all the variables

-3a+90=0

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

-3a=-90

a=-90/-3

a=+30

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