7r=7(2r+9)

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Solution for 7r=7(2r+9) equation: 



7r=7(2r+9)

We move all terms to the left:

7r-(7(2r+9))=0



We calculate terms in parentheses: -(7(2r+9)), so:

7(2r+9)

We multiply parentheses

14r+63

Back to the equation:

-(14r+63)



We get rid of parentheses

7r-14r-63=0

We add all the numbers together, and all the variables

-7r-63=0

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

-7r=63

r=63/-7

r=-9

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