9r-(4r+3)=12

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



9r-(4r+3)=12

We move all terms to the left:

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

We get rid of parentheses

9r-4r-3-12=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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