F=60, s=60/2=30
(60-x)/(30-x)=4
60-x=120-4x
60+3x=120
3x=60
x=20
s=30-x
s=30-20
s=10
So the boy was 10 years old when his father was four times his age.
A..........duh just read the sides of the graph
Answer:
130 Miles
Step-by-step explanation:
Answer:
Step-by-step explanation: