Question

The sum of Sally and Beth's age is 60. Six years ago, Sally was 3 times as old as Beth. What are their present ages?

Answer 1

Explanation:

s + b = 60 <===== given or b = 60 - s

(s-6) = 3 ( b-6) sub in for 'b'

s-6 = 3 ( 60-s -6) solve for s

s -6 = 162 - 3s

4s = 168

s = 42 then b = 60 - s = 18 y/o