SOLUTION: John is 63 years old. Erin is 27 years old. How many years ago was John's age 5 times Erin's age?

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Question 1116939: John is 63 years old. Erin is 27 years old. How many years ago was John's age 5 times Erin's age?
Answer by ikleyn(52814) About Me  (Show Source):
You can put this solution on YOUR website!
.
Let x be  "How many years ago was John's age 5 times Erin's age?"


Then 

63 - x = 5(27-x)

63 - x = 135 - 5x

5x - x = 135 - 63 = 72  ====>  4x = 72  ====>  x = 72%2F4 = 18.


Answer.  18 years ago.

Solved.

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There is a bunch of lessons on age word problems
    - Age problems and their solutions
    - A fresh formulation of a traditional age problem
    - Really intricate age word problem
    - Selected age word problems from the archive
    - Age problems for mental solution
in this site.

Read them and become an expert in solving age problems.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Age word problems".


Save the link to this online textbook together with its description

Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson

to your archive and use it when it is needed.