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13.9r+10.66+3.3r=-18.07+15.5r
We move all terms to the left:
13.9r+10.66+3.3r-(-18.07+15.5r)=0
We add all the numbers together, and all the variables
13.9r+3.3r-(15.5r-18.07)+10.66=0
We add all the numbers together, and all the variables
17.2r-(15.5r-18.07)+10.66=0
We get rid of parentheses
17.2r-15.5r+18.07+10.66=0
We add all the numbers together, and all the variables
1.7r+28.73=0
We move all terms containing r to the left, all other terms to the right
1.7r=-28.73
r=-28.73/1.7
r=-16+1/1.1111111111111
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