8r-15=4r+r

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Solution for 8r-15=4r+r equation: 



8r-15=4r+r

We move all terms to the left:

8r-15-(4r+r)=0

We add all the numbers together, and all the variables

8r-(+5r)-15=0

We get rid of parentheses

8r-5r-15=0

We add all the numbers together, and all the variables

3r-15=0

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

3r=15

r=15/3

r=5

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