1200=(210)(5)r

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Solution for 1200=(210)(5)r equation: 



1200=(210)(5)r

We move all terms to the left:

1200-((210)(5)r)=0

determiningTheFunctionDomain
-2105r+1200=0

We move all terms containing r to the left, all other terms to the right

-2105r=-1200

r=-1200/-2105

r=240/421

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