77=88+11r

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Solution for 77=88+11r equation: 



77=88+11r

We move all terms to the left:

77-(88+11r)=0

We add all the numbers together, and all the variables

-(11r+88)+77=0

We get rid of parentheses

-11r-88+77=0

We add all the numbers together, and all the variables

-11r-11=0

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

-11r=11

r=11/-11

r=-1

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