12r+5+3r-5=-45

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Solution for 12r+5+3r-5=-45 equation: 



12r+5+3r-5=-45

We move all terms to the left:

12r+5+3r-5-(-45)=0

We add all the numbers together, and all the variables

15r+45=0

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

15r=-45

r=-45/15

r=-3

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