SOLUTION: Eddie is three times as old dave. seven years ago,eddie was five times old as dave.how old are they now?

Question 490860: Eddie is three times as old dave. seven years ago,eddie was five times old as dave.how old are they now?
Answer by Maths68(1474) (Show Source): You can put this solution on YOUR website!
Let
x=Eddie�s current age
y=Dave�s current age
Eddie is three times as old Dave means
x=3y��..(1)
Seven years ago means we have to subtract 7 from both ages
x-7=y-7
then
Eddie was five times old as Dave
x-7=5(y-7)
x-7=5y-35
x=5y-35+7
x=5y-28��(2)
Put the value of x from (1) to (2)
x=5y-28
3y=5y-28
3y-5y=-28
-2y=-28
Divide by -2 both sides of above equation
-2y/-2=-28/-2
y=14
Put the value of y in equation (1)
x=3y
x=3(14)
x=42
Eddie is 42 and Dave is 14 years old.

RELATED QUESTIONS
Please help me solve this equation:Daniel is three times as old as kathryn. seven years... (answered by josmiceli,ikleyn)

Maria is five times as old as her daughter. Three years ago she was seven times as old as (answered by chen)

A father is three times as old as his son. Six years ago he was five times as old as his... (answered by Cromlix)

Karl's and Eddie's ages added together are equal to 65. Ten years ago, Karl was twice as... (answered by scott8148)

Helloo. Good Day!! I am having a hard time answering this. I hope you could help me.... (answered by math_tutor2020)

a father is now four times as old as his son. five years ago he was seven times as old as (answered by stanbon)

Dave is twice as old as Rick. Ten years ago the sum of their ages was 40. How old are... (answered by checkley79,MathTherapy)

A father is three times as old as his son .Six years ago he was five times as old as his... (answered by Alan3354)

Five years ago shivani was three times as old as shashi.Ten years later shivani would be... (answered by ankor@dixie-net.com)