Problema Solution
Shelly is 3 years older than Michele. Four years ago the sum of their age was 67. Find the age of each person now
Answer provided by our tutors
let
s = the years of Shelly at the moment
m = the years of Michele at the moment
Shelly is 3 years older than Michele
s = 3 + m
4 years ago the sum of their age was 67
(s - 4) + (m - 4) = 67
s + m = 75
by solving the system
s = 3 + m
s + m = 75
we find
s = 39 years
m = 36 years
Shelly is 39 years old now.
Michele is 36 years old now.