Answer:
85$
Explanation:
p = original price
68 = p - 20%p
68 = p - 0.20p
68 = 0.80p
85 = p
The original price was $85.
The original price is 100%. The sales price was 20% off - subtract. So the sale price was 100% - 20% = 80%.
Incase you wanna know how I came up with the 0.80p :)