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-2.14=r-4.5
We move all terms to the left:
-2.14-(r-4.5)=0
We get rid of parentheses
-r+4.5-2.14=0
We add all the numbers together, and all the variables
-1r+2.36=0
We move all terms containing r to the left, all other terms to the right
-r=-2.36
r=-2.36/-1
r=2+0.36/1
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