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0.5=0.25r
We move all terms to the left:
0.5-(0.25r)=0
We add all the numbers together, and all the variables
-(+0.25r)+0.5=0
We get rid of parentheses
-0.25r+0.5=0
We move all terms containing r to the left, all other terms to the right
-0.25r=-0.5
r=-0.5/-0.25
r=+2
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