3r-7=r+8

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Solution for 3r-7=r+8 equation: 



3r-7=r+8

We move all terms to the left:

3r-7-(r+8)=0

We get rid of parentheses

3r-r-8-7=0

We add all the numbers together, and all the variables

2r-15=0

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

2r=15

r=15/2

r=7+1/2

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