r+7=5r+4r+15

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Solution for r+7=5r+4r+15 equation: 



r+7=5r+4r+15

We move all terms to the left:

r+7-(5r+4r+15)=0

We add all the numbers together, and all the variables

r-(9r+15)+7=0

We get rid of parentheses

r-9r-15+7=0

We add all the numbers together, and all the variables

-8r-8=0

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

-8r=8

r=8/-8

r=-1

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