SOLUTION: A is twice as old as B; ten years ago he was four times as old.what are their present ages?

Algebra.Com
Question 452499: A is twice as old as B; ten years ago he was four times as old.what are their present ages?
Answer by richwmiller(17219)   (Show Source): You can put this solution on YOUR website!
a-10=4*(b-10)
a=2b
2b-10=4b-40
30=2b
15=b
a=30
check
20=4*5
ok
RELATED QUESTIONS

Ten years ago John was four times as old as bill. now he is only twice as old as bill.... (answered by solver91311)
Ten years ago John was four times as old as bill. now he is only twice as old as bill.... (answered by solver91311)
A boy is twice as old as his brother - 4 years ago he was 3 times as old as his brother.... (answered by jorel1380)
A father is twice as old as his son. Ten years ago he was three times as old as his son. (answered by ankor@dixie-net.com)
Maridol is twice as old as Maricel. In six years, she will be four times as old as... (answered by Seutip)
ten years ago, jane was four times as old as maria now she is only twice as old as maria. (answered by josmiceli)
John is twice as old as his brother. Four years ago, he was four times as old as his... (answered by ankor@dixie-net.com)
John is twice as old as his brother. Four years ago, he was four times as old as his... (answered by rapaljer)
A mother is twice as old as her daughter now, but ten years ago, she was 3 times as old (answered by Theo)