Word Problem

[nicolette]

This year, your brother Jack will be two years from being twice as old as his sister, Jen. The sum of Jack's age and three times Jen's age is 66. How old is Jen?

Please help me!

 

[Deleted member 4993]

This year, your brother Jack will be two years from being twice as old as his sister, Jen. The sum of Jack's age and three times Jen's age is 66. How old is Jen?

Please help me!

First let us determine - what is that you need to find? ? Jen's age.

Define variables:

Jen's Age now = N

Jack's Age now = K

This year, your brother Jack will be two years from being twice as old as his sister, Jen

K + 2 = 2 * (N + 2)...........................................(1)

The sum of Jack's age and three times Jen's age is 66

K + 3N = 66 ..................................................(2)

Now solve for N

 

[nicolette]

Thank you for your help.

The answer sheet said that Jen's age is 10. I am looking at your equations and I still can't figure out how they reached 10. I am trying to learn how to do word problems before eighth grade. Please help me if you can!

 

[Deleted member 4993]

Please review your post again check against the problem written in the book. There is something wrong - I cannot even get whole number as answers.

 

[nicolette]

That is what I thought. I Thank You very much. I must find a better source for word problems. I pulled that one from about.com. I will not go there again. Thanks again!