Wednesday

August 20, 2014

August 20, 2014

Posted by **Anjanique** on Tuesday, February 8, 2011 at 8:46am.

Billy is twice as ld as Sally was when billy was as old as Sally is now. And the total ages is 28 how old are they?

- Math -
**drwls**, Tuesday, February 8, 2011 at 9:08amLet Sally's age be S.

S = 12 + (S/2)

S/2 = 12

S = 24

=============================

(new question; different age for Sally, S)

Let Billy's age(now) be B; Sally's age (now) = S. Billy is older by B-S years

B + S = 28

B = 2*[S - (B-S)] = 4S -2B

3B -4S = 0

4B + 4S = 112

7B = 112

B = 16

S = 12

When Billy was 12, Sally was 8; he is 16 now. It checks

**Related Questions**

Math problem solvimg - Sally's grandfather is 67 tears old. Sally is 19 years ...

Math - 1.Sally age is 12 years plus half her age. How old is she? 2.Given that: ...

math - john is the age that sally was 3 years ago,13 year old elissa is 3 years ...

Math - Sally's grandfather is 67 and Sally is 19. At what age will Sally be ...

math - Sally is 54 years old and her mother is 80, how many years ago was Sally’...

MATH - suzy is ten years older than Billy and next year she will be twice as old...

ALGEBRA - SUZY IS 10 YEARS OLDER THAN BILLY, AND NEXT YEAR SHE WILL BE TWICE AS ...

english - sally who is sue's mother is 4 times older than sue but in 20 years ...

Math - Sorry guys but I cant seem to figure this out can you help me:) Billy has...

Math - 2x represents that Clyde is twice (2 times) as old as Bonnie. 6 years ...