3r+5=7r-25

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Solution for 3r+5=7r-25 equation: 



3r+5=7r-25

We move all terms to the left:

3r+5-(7r-25)=0

We get rid of parentheses

3r-7r+25+5=0

We add all the numbers together, and all the variables

-4r+30=0

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

-4r=-30

r=-30/-4

r=7+1/2

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