15-r+12+70=180

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Solution for 15-r+12+70=180 equation: 



15-r+12+70=180

We move all terms to the left:

15-r+12+70-(180)=0

We add all the numbers together, and all the variables

-1r-83=0

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

-r=83

r=83/-1

r=-83

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