9r+-2r+-3r=12

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Solution for 9r+-2r+-3r=12 equation: 



9r+-2r+-3r=12

We move all terms to the left:

9r+-2r+-3r-(12)=0

determiningTheFunctionDomain
9r-2r-3r-12++=0

We add all the numbers together, and all the variables

4r=0

r=0/4

r=0

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