Answer:
Number of basketball = 9
Number of football = 15
Step-by-step explanation:
let number of basketball = x
let number of football = y
Given that cost of 1 basketball = 22
Then cost of x basketball = 22x
Given that cost of 1 football = 30
Then cost of x football = 30y
Then total expense = 22x+30y
Given total expense is $648 so we can set both equal to each other and get:
22x+30y=648...(i)
Given that they bought 6 more footballs than basketballs
so we get:
y=6+x...(ii)
Now plug (ii) into (i)
22x+30y=648
22x+30(6+x)=648
22x+180+30x=648
52x+180=648
52x=648-180
52x=468
x=9
plug x=9 into (ii)
y=6+x=6+9=15
Hence final answer is :
Number of basketball = 9
Number of football = 15