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Rufina [12.5K]
3 years ago
5

I am attaching the question

Mathematics
1 answer:
mafiozo [28]3 years ago
4 0

<u>Answer:</u>

r = \frac{120t}{120-t}

<u>Step-by-step explanation:</u>

Multiply both sides by r + 120.

<em>t </em>(<em>r </em>+ 120) = 120<em>r</em>

Expand.

<em>tr </em>+ 120<em>t </em>= 120<em>r</em>

Subtract <em>tr</em> from both sides.

120<em>t  </em>= 120<em>r </em>- <em>tr</em>

Factor out the common term <em>r</em>.

120<em>t </em>= <em>r </em>(120-<em>t</em>)

Divide both sides by 120 -<em> t</em>.

\frac{120t}{120-t} = r

Finally, switch <em>r</em> to the left side and you get your answer.

//also, sorry for answering late.. my wifi is poopy//

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