2r+3=7r-12

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Solution for 2r+3=7r-12 equation: 



2r+3=7r-12

We move all terms to the left:

2r+3-(7r-12)=0

We get rid of parentheses

2r-7r+12+3=0

We add all the numbers together, and all the variables

-5r+15=0

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

-5r=-15

r=-15/-5

r=+3

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