SOLUTION: jack's dad is 40 years old. Jack is fourteen years old. How old will each of them be when his dad is twice as old as jack?
Algebra.Com
Question 451778: jack's dad is 40 years old. Jack is fourteen years old. How old will each of them be when his dad is twice as old as jack?
Found 2 solutions by stanbon, pedjajov:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
jack's dad is 40 years old. Jack is fourteen years old. How old will each of them be when his dad is twice as old as jack?
-------
Equations:
D = 40
J = 14
---
Solve for "x"
(D+x) = 2(J+x)
(40+x) = 2(14+x)
40+x = 28+2x
x = 12 years
------
Dad will be 52
Jack will be 26
================
Cheers,
Stan H.
Answer by pedjajov(51) (Show Source): You can put this solution on YOUR website!
After x years Jack's age is going to be 14+x and his dad's 40+x.
Dad's age should be twice of Jack's so
, multiply
, subtract 28 on the both sides
, subtract x on both sides
Check:
After 12 years Jack will be 14+12 = 26
Dad is going to be 40+12 = 52 which is twice 26.
RELATED QUESTIONS
Jack's dad is 40 years old. Jack is 14 years old. How old will each of them be when his (answered by JBarnum,solver91311)
How old are they?
Jack's dad is 40. Jack is 14. How old will each of them be when his... (answered by checkley75)
Today is Jack’s birthday and Jill’s birthday. Jack is five and Jill is nine.
How many... (answered by josgarithmetic)
Jack is 15 years old, and his sister, Jane is 5 years old. In how many years will jack be (answered by ankor@dixie-net.com,checkley77)
Chuck is 22 years older than Jack. When Jack is as old as Chuck is now, he will be three... (answered by josmiceli)
Dad is three times as old as his son. In nine years dad will be twice as old as his son... (answered by fractalier)
Jack is twice as old as Jill.In 2 years,jack will be 4 times as old as Jill was 9 years... (answered by checkley71)
Jack is twice as old as Jill. In 2 years, Jack will be 4 times as old as Jill was 9 years (answered by TakeATuition.com)
Jack is twice as old as Jill. In 2 years, Jack will be 4 times as old as Jill was 9... (answered by ankor@dixie-net.com)