Answer:
Peyton: 6 years old
Matt: 24 years old
Justin: 9 years old
Step-by-step explanation:
P= Peyton M= Matt J= Justin
P=J-3
M=4P
J+P+M=39
4J-12=M 4J-12=39-J-P
5J-51=-P P=J-3
5J-51=-J+3 J=9
P=9-3 P=6
M=4(6) M=24
