Answer:
1st or 3rd i think. hope this helps.
The answer is going to be 9300.
Answer:
39
Step-by-step explanation:
ur welcome
Let y= years ago when dad's age was 4 times son's age
60-y=4(30-y)
60-y=120-4y
-y+4y=120-60
3y=60
y=60/3
y= 20 years ago
Then 30-20= 10 yrs. old, the boys age when his dad was 40 years old.
