Problema Solution
Micah's age is 18 and her mother is 42. How many years ago was the mother three times as old as Micah's?
Answer provided by our tutors
let x = the number of years ago when the mother was three times as old as Micah's
42 - x = 3(18 - x)
by solving we find
x = 6 years
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indeed 6 years ago Micah was 18 - 6 = 12 years old and her mother was 42 - 6 = 36 years old and 36 = 3*12.