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0.03r+0.025(1000-r)=27.25
We move all terms to the left:
0.03r+0.025(1000-r)-(27.25)=0
We add all the numbers together, and all the variables
0.03r+0.025(-1r+1000)-(27.25)=0
We add all the numbers together, and all the variables
0.03r+0.025(-1r+1000)-27.25=0
We multiply parentheses
0.03r-0.025r+25-27.25=0
We add all the numbers together, and all the variables
0.005r-2.25=0
We move all terms containing r to the left, all other terms to the right
0.005r=2.25
r=2.25/0.005
r=450
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