SOLUTION: A is now three times older than B. In 5 years A will be twice as old as B will be then. Find their present ages. I am an English teacher tutoring math and can't remember how to

Question 968769: A is now three times older than B. In 5 years A will be twice as old as B will be then. Find their present ages.
I am an English teacher tutoring math and can't remember how to do this one.
Found 2 solutions by rothauserc, Alan3354:
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
A = 3B
A +5 = 2(B +5)
A +5 = 2B +10
now substitute for A = 3B
3B +5 = 2B +10
subtract 2B form both sides of =
B +5 = 10
B = 5 and A = 15
****************************
check answer by substituting for A and B in the second equation
15 +5 = 2(5+5)
20 = 20
our answer checks

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
I am an English teacher...
============
Then you probably know that 3 times older = 4 times as old. Right?
RELATED QUESTIONS
A is now 9 years older than B. In 10 years, A will be twice as old as B was 10 years ago. (answered by richwmiller)
A is now 9 years older than b. In 10 years,A will be twice as old as 2 was 10 yrs ago.... (answered by skartikey)
i need help with this problems. 1. rose is 6 years older than her sister cora. in four (answered by sdmmadam@yahoo.com)
Katie is now three times as old a s emily. in 10 yeaars, katie will be twice as old as... (answered by ewatrrr)
A man is now three times old as his daughter. In twelve years time he will be twice as... (answered by ankor@dixie-net.com)
Mark is two years older than Buddy. In a year from now, Mark will be twice as old as... (answered by ikleyn)
At present A is five times older than B. After 12 years A would be twice as old as B then (answered by Cromlix)
a women is now 24 years older than her niece in 8 years she will be twice as old as her... (answered by TimothyLamb,MARIO OWHOLO)
Will is 4 years older than Phil. Three years from now, Will will be twice as old as Phil... (answered by mathstutor494)