Sam's coach is twice as old as Sam. When Sam started soccer 10 years ago, his coach was four times his age. How old is Sam now?

Question

1612 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-04-19T19:15:33

#15# years ago now.

Let Sam's age be #x#. Let Sam's coach's age be #2x#.

Therefore,

#4(x-10) = 2x-10#

since #4# times the age of Sam #10# years ago was the same as the coach's #10# years ago.

So

#4x - 40 = 2x - 10#

#=> 2x = 30#

Therefore, Sam's age is #15#.