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0.02(50)+0.08r=.4(50+)
We move all terms to the left:
0.02(50)+0.08r-(.4(50+))=0
We add all the numbers together, and all the variables
0.08r+0.0250-(.40)=0
We add all the numbers together, and all the variables
0.08r-0.375=0
We move all terms containing r to the left, all other terms to the right
0.08r=0.375
r=0.375/0.08
r=4+0.055/0.08
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