A store warehouses 40 more portables than big screen TVs sets and 15 more consoles than big screen sets. Storage cost for the different TVs sets are shown in the table. If storage costs 302 per month how many big screen sets are in stock

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