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44 votes
What both sides am I supposed to divide by 5?

What both sides am I supposed to divide by 5?-example-1
User Particle
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1 Answer

13 votes
13 votes

The numbers on the right column follows the following formula


(5)/(6)n

Therefore, the number on the right column for question 3 is also on this format. 150 is equal to this expression for some given n, to find this value of n we just need to estabilish an equality between 150 and the expression.


150=(5)/(6)n

Solving this expression for n, we have


\begin{gathered} 150=(5)/(6)n \\ 6\cdot(150)=6\cdot((5)/(6)n) \\ 900=5n \\ ((900))/(5)=((5n))/(5) \\ 180=n \end{gathered}

And this give to us the n value, that is also the value for the left column. The answer for question 3 is 180.

User Vasily Komarov
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