25=7+3r

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Solution for 25=7+3r equation: 



25=7+3r

We move all terms to the left:

25-(7+3r)=0

We add all the numbers together, and all the variables

-(3r+7)+25=0

We get rid of parentheses

-3r-7+25=0

We add all the numbers together, and all the variables

-3r+18=0

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

-3r=-18

r=-18/-3

r=+6

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