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44.9=r+12.5
We move all terms to the left:
44.9-(r+12.5)=0
We get rid of parentheses
-r-12.5+44.9=0
We add all the numbers together, and all the variables
-1r+32.4=0
We move all terms containing r to the left, all other terms to the right
-r=-32.4
r=-32.4/-1
r=32+0.4/1
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