31=12r+7

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Solution for 31=12r+7 equation:



31=12r+7
We move all terms to the left:
31-(12r+7)=0
We get rid of parentheses
-12r-7+31=0
We add all the numbers together, and all the variables
-12r+24=0
We move all terms containing r to the left, all other terms to the right
-12r=-24
r=-24/-12
r=+2

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