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.5r+1.1=2.9
We move all terms to the left:
.5r+1.1-(2.9)=0
We add all the numbers together, and all the variables
.5r-1.8=0
We move all terms containing r to the left, all other terms to the right
.5r=1.8
r=1.8/.5
r=3+0.3/.5
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