2r+15=1+8r-4

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Solution for 2r+15=1+8r-4 equation: 



2r+15=1+8r-4

We move all terms to the left:

2r+15-(1+8r-4)=0

We add all the numbers together, and all the variables

2r-(8r-3)+15=0

We get rid of parentheses

2r-8r+3+15=0

We add all the numbers together, and all the variables

-6r+18=0

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

-6r=-18

r=-18/-6

r=+3

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