Question 1121274
Davis=D
Peter=P
Now, D=3P
5 years ago D-5
D-5=4(P-5)
D-5=4P-20
D=4P-15
substitute
3P=4P=15
P=15 years old
D=45 years old
5 years ago it was P 10 and D 40.
10 years ago it was P 5 and D 35