Shelly is 3 years older than Michele. Four years ago the sum of their age was 67. Find the age of each person.

total of ages now is 67 + 4 + 4 = 75

S=shelly

M = Michelle

Michelle is 3 yrs younger than Shelly so use S-3

S + M = 75

replace M with S-3 to get:

S + S-3=75

2S=78

s=39

So shelly is 39

Michelle is 3 years younger = 39-3 = 36

It's is 36 I think I am not sure