Janie is three years younger than her brother Chad and she is 12 years old
Janie is 3 years younger than her brother Chad.
let
Chad age = x
Janie age = x - 3
The sum of there ages is 27. Therefore,
x + x - 3 = 27
2x - 3 = 27
2x = 30
divide both sides by 2
x = 30 / 2
x = 15
Chad age = 15 years
Janie's age = 15 - 3 = 12 years
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