7r=64-r

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Solution for 7r=64-r equation: 



7r=64-r

We move all terms to the left:

7r-(64-r)=0

We add all the numbers together, and all the variables

7r-(-1r+64)=0

We get rid of parentheses

7r+1r-64=0

We add all the numbers together, and all the variables

8r-64=0

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

8r=64

r=64/8

r=8

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