John is now 3 times as old as his brother Sam. In 5 years, John will be twice as old as Sam will be then. Find their present ages John is now 3 times as old as his brother Sam. In 5 years, John will be twice as old as Sam will be then. Find their present ages @Mathematics

Question

John is now 3 times as old as his brother Sam.     In 5 years, John will be twice as old as Sam will be then.     Find their present ages John is now 3 times as old as his brother Sam.     In 5 years, John will be twice as old as Sam will be then.     Find their present ages @Mathematics

anonymous · Answer

Sam is x
John is 3x

In 5 years
Sam is x + 5
John is 3x + 5

anonymous · Answer

So the equation is 3x + 5 = 2(x + 5)

anonymous · Answer

3x + 5 = 2x + 10
x = 5

anonymous · Answer

So you go back to
Sam = x
John = 3x 

and plug in x = 5
Sam = 5
John = 15

anonymous · Answer

THANKS GUY