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34.50r+7850(810-r)=29045
We move all terms to the left:
34.50r+7850(810-r)-(29045)=0
We add all the numbers together, and all the variables
34.50r+7850(-1r+810)-29045=0
We multiply parentheses
34.50r-7850r+6358500-29045=0
We add all the numbers together, and all the variables
-7815.5r+6329455=0
We move all terms containing r to the left, all other terms to the right
-7815.5r=-6329455
r=-6329455/-7815.5
r=809+1221/1421
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