-63=63+9r

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Solution for -63=63+9r equation: 



-63=63+9r

We move all terms to the left:

-63-(63+9r)=0

We add all the numbers together, and all the variables

-(9r+63)-63=0

We get rid of parentheses

-9r-63-63=0

We add all the numbers together, and all the variables

-9r-126=0

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

-9r=126

r=126/-9

r=-14

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