7r+8=3r-8

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



7r+8=3r-8

We move all terms to the left:

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

We get rid of parentheses

7r-3r+8+8=0

We add all the numbers together, and all the variables

4r+16=0

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

4r=-16

r=-16/4

r=-4

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