SOLUTION: Sam is four years younger than Jo. But in five years time Jo will be twice Sam age now. How old are they now?

Question 978630: Sam is four years younger than Jo. But in five years time Jo will be twice Sam age now. How old are they now?
Answer by ikleyn(52790) (Show Source): You can put this solution on YOUR website!

Let x be the Sam's age now.
Then Jo's age now is x+4, according to the condition.

In 5 years Jo's age will be (x+4)+5, and it is twice Sam's age now:

(x+4)+5 = 2x.

It gives

x + 9 = 2x,
x = 9.

So, Sam is 9 years old now. Jo is 9 + 4 = 13 years old now.

Answer. Sam is 9 years old now. Jo 13 years old now.

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