Answer: the original price before Thursday's discount is $250
Step-by-step explanation:
Let x represent the original price before Thursday's discount.
The store reduces the price of a 50 inch television by 20% on Thursday. It means that the amount by which it was reduced is
20/100 × x = 0.2x
The new price on Thursday would be
x - 0.2x = 0.8x
The store then reduces that price by another 15% on Sunday. It means that the amount by which it was reduced is
15/100 × 0.8x = 0.12x
The new price on Sunday would be
0.8 - 0.12 = 0.68x
If the final price of the television is 170, it means that
0.68x = 170
x = 170/0.68
x = 250
