Question 507864
J = Joe's age
M = Mack's age
.
J = 3*M
.
J -M = 24
so
J = 24 + M
.
substitute J = 24+M
.
24+M = 3M
2M = 24
M = 12
.
J =3(12)
J =36
.
The difference in their ages is 36-12=24.
.
Answer: Joe is 36, and Mack is 12.
.
Done.