Answer:
14 sets
Step-by-step explanation:
Let the number of big screen TV sets be---------x
Portable TV screen sets will be-------x + 40
Console TV sets will be---------- x + 15
The total cost of storage per month is : $302
The equation for total cost is;
7.50 x + 4{ x+15} + 1.50 { x+40 } = 302
7.50x + 4x + 60 + 1.50 x + 60 =302
13x = 302- 120
13x = 182
x = 14