15r-21=8r+14

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Solution for 15r-21=8r+14 equation: 



15r-21=8r+14

We move all terms to the left:

15r-21-(8r+14)=0

We get rid of parentheses

15r-8r-14-21=0

We add all the numbers together, and all the variables

7r-35=0

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

7r=35

r=35/7

r=5

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