8r+14=r-21

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



8r+14=r-21

We move all terms to the left:

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

We get rid of parentheses

8r-r+21+14=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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