Thursday

April 2, 2015

April 2, 2015

Posted by **wan** on Sunday, September 16, 2012 at 1:26am.

- math -
**David Q/R**, Sunday, September 16, 2012 at 2:04pmLet my age now be A, and let Mum's age now be M. Then we know that:

A = M/3, so 3A = M

A-8 = (M-8)/5, so 5A-40 = M-8

but M = 3A, so 5A-40 = 3A-8

so 2A = 40-8 = 32

so A = 16

so M = 48.

Check it: A is one-third of M, and eight years ago I would have been 8 and Mum would have been 40.

But I want to know what Mum's age will be 8 years from now, so that will be 48 + 8 = 56.

**Answer this Question**

**Related Questions**

math - A. A woman was 30 years old when her daughter was born.Her age is now 6 ...

Algebra - One half of Heather's age two years from now plus one third of her age...

math - 1. Lisa is 15 years old and her father is 40. How many years ago was the ...

Math - One-third of Derick's age two years ago is equal to a quarter of his age ...

math - 5 yrs ago Montys age was 5 years less than twice Rachels age. In 3 years...

math - cristy age 15 years ago equals the sum of 2/9 of her age 15 years hence ...

Mathematics-please help quick!! - Harry is twice as old as Doyle. Doyle's age is...

algebra - 5 yrs ago Montys age was 5 years less than twice Rachels age. In 3 ...

math - A. John is now 10 years older than Marcus. Three times John's age 5 years...

Math - How many years old is a person if her age now is equal to her age in 3 ...