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r=250/2000
We move all terms to the left:
r-(250/2000)=0
We add all the numbers together, and all the variables
r-(+250/2000)=0
We get rid of parentheses
r-250/2000=0
We multiply all the terms by the denominator
r*2000-250=0
Wy multiply elements
2000r-250=0
We move all terms containing r to the left, all other terms to the right
2000r=250
r=250/2000
r=1/8
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