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0.5r-3=3-4-1.5
We move all terms to the left:
0.5r-3-(3-4-1.5)=0
We add all the numbers together, and all the variables
0.5r-3-(-2.5)=0
We add all the numbers together, and all the variables
0.5r-0.5=0
We move all terms containing r to the left, all other terms to the right
0.5r=0.5
r=0.5/0.5
r=1
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