Answers

  • Brainly User
2015-09-04T16:33:50+08:00

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Present ages:
Let age of Carla: x
      Sam's age: x + 5
      Kit's age:  2(x+5) or  2x+10

Their ages in 5 years (future):
     Carla:  X + 5
     Sam: x+5 + 5  or x +10
     Kit: 2x+10+5 or 2x+15

Condition in 5 years:
   Kit's age will be three times as old as Carla

Equation
   2x + 15 = 3(x+5)
   2x+15 = 3x + 15
  3x-2x = 15-15
        x = 0

Present Age:
  Carla: x = 0  (she's maybe a newborn or infant)
  Sam:  X + 5 
             0 + 5 = 5 years old
  Kit: 2x + 10
        2(0) + 10 = 10 years old

How old is Sam?  Sam is 5 years old
      

1 2 1