4r+3=7r-12

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Solution for 4r+3=7r-12 equation: 



4r+3=7r-12

We move all terms to the left:

4r+3-(7r-12)=0

We get rid of parentheses

4r-7r+12+3=0

We add all the numbers together, and all the variables

-3r+15=0

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

-3r=-15

r=-15/-3

r=+5

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