64=25+r

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Solution for 64=25+r equation: 



64=25+r

We move all terms to the left:

64-(25+r)=0

We add all the numbers together, and all the variables

-(r+25)+64=0

We get rid of parentheses

-r-25+64=0

We add all the numbers together, and all the variables

-1r+39=0

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

-r=-39

r=-39/-1

r=+39

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