9r+2=4r+12

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Solution for 9r+2=4r+12 equation: 



9r+2=4r+12

We move all terms to the left:

9r+2-(4r+12)=0

We get rid of parentheses

9r-4r-12+2=0

We add all the numbers together, and all the variables

5r-10=0

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

5r=10

r=10/5

r=2

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