Denali and Nate work for a dog walking business and are paid for each dog they walk. Denali is responsible for 16 dogs and Nate is responsible for 12 dogs. Under the company's new policy, they will be assigned or unassigned new dogs in groups of x dogs. The ratio of Denali's pay to Nate's pay would be the same if Denali started walking 4x$ more dogs and Nate stayed at 12 dogs or if x of Nate's dogs were reassigned to Denali. Find x if x is not 0.

Lightning Apr 21, 2019

#1**+1 **

16 + 4x 16 + x

______ = ______ cross - multiply

12 12 - x

[ 16 + 4x ] [ 12 - x ] = 12 [ 16 + x ] simplify

192 + 32x - 4x^2 = 192 + 12x rearrange as

4x^2 - 20x = 0

4x ( x - 5) = 0

Only the second factor gives a non-zero answer

x = 5

Check

16 + 4(5) 16 + 5

________ = ________

12 12 - 5

36 21

__ = ___ = 3 .....so.....5 is good !!!!

12 7

CPhill Apr 21, 2019