12=27-r

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Solution for 12=27-r equation:



12=27-r
We move all terms to the left:
12-(27-r)=0
We add all the numbers together, and all the variables
-(-1r+27)+12=0
We get rid of parentheses
1r-27+12=0
We add all the numbers together, and all the variables
r-15=0
We move all terms containing r to the left, all other terms to the right
r=15

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