Answers

  • Brainly User
2016-04-15T13:55:33+08:00
Present ages:
x = Cara's age
x + 5 = Sam's age
2(x+5) or 2x + 10 = Kit's age

Ages in 5 years:
x + 5 = Cara's age
x + 5 + 5  or x + 10 = Sam's age
2x + 10 + 5 or 2x + 15 = Kit's age

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

Present Ages:
Cara:  x ⇒ 0  (below 1 year old)
Sam:  x + 5  ⇒ 0 + 5 = 5 years old
Kit: 2x + 10  ⇒ 2(0) + 10 = 10 years old

ANSWER:  Sam is 5 years old.
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