12r+4+30r=9(8r-3)+7

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Solution for 12r+4+30r=9(8r-3)+7 equation: 



12r+4+30r=9(8r-3)+7

We move all terms to the left:

12r+4+30r-(9(8r-3)+7)=0

We add all the numbers together, and all the variables

42r-(9(8r-3)+7)+4=0



We calculate terms in parentheses: -(9(8r-3)+7), so:

9(8r-3)+7

We multiply parentheses

72r-27+7

We add all the numbers together, and all the variables

72r-20

Back to the equation:

-(72r-20)



We get rid of parentheses

42r-72r+20+4=0

We add all the numbers together, and all the variables

-30r+24=0

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

-30r=-24

r=-24/-30

r=4/5

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