Posted by **mary** on Monday, December 5, 2011 at 8:45am.

Jack is twice as old as he was 5 years ago. His mother was then six times as old as he was. She is now 35 years old.

how old is jack?

- math -
**Reiny**, Monday, December 5, 2011 at 9:14am
5 yrs ago Jack was x years old

5 years ago his mom was 6x

now his mom is 6x+5

and now Jack is x+5

6x+5 = 35

6x = 30

x = 5

Jack is now 10

check:

5 yrs ago: Jack was 5, his mom was 6(5) = 30

now: Jack is 10, his mom is 6(5) + 5 = 35

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