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2.6r+1.3=-16.9
We move all terms to the left:
2.6r+1.3-(-16.9)=0
We add all the numbers together, and all the variables
2.6r+18.2=0
We move all terms containing r to the left, all other terms to the right
2.6r=-18.2
r=-18.2/2.6
r=-6+1/1
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