15r+15=7r-25

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Solution for 15r+15=7r-25 equation: 



15r+15=7r-25

We move all terms to the left:

15r+15-(7r-25)=0

We get rid of parentheses

15r-7r+25+15=0

We add all the numbers together, and all the variables

8r+40=0

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

8r=-40

r=-40/8

r=-5

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