8r-7=3r-12

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Solution for 8r-7=3r-12 equation: 



8r-7=3r-12

We move all terms to the left:

8r-7-(3r-12)=0

We get rid of parentheses

8r-3r+12-7=0

We add all the numbers together, and all the variables

5r+5=0

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

5r=-5

r=-5/5

r=-1

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