31=9(7r+5)

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Solution for 31=9(7r+5) equation: 



31=9(7r+5)

We move all terms to the left:

31-(9(7r+5))=0



We calculate terms in parentheses: -(9(7r+5)), so:

9(7r+5)

We multiply parentheses

63r+45

Back to the equation:

-(63r+45)



We get rid of parentheses

-63r-45+31=0

We add all the numbers together, and all the variables

-63r-14=0

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

-63r=14

r=14/-63

r=-2/9

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