4r-3=9r+12=

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Solution for 4r-3=9r+12= equation: 



4r-3=9r+12=

We move all terms to the left:

4r-3-(9r+12)=0

We get rid of parentheses

4r-9r-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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