Answer:
The cost of old ball is $120.
Step-by-step explanation:
Consider the provided information.
The cost of new ball is $300.
Which is three times the price of his old ball less $60.
Let the price of old ball is x.
Thus the above information can be written as:
[tex]3x-60=300[/tex]
[tex]3x=360[/tex]
[tex]x=120[/tex]
Hence, the cost of old ball is $120.
