Question 505152
Original Price = o = ?
Discount = d = 20% of o = (o)*20/100=(o)*1/5=o/5
Sale-price = s = $120

Original Price = Sale-price + discount
o=s+d
o=120+(o/5)
Multiply by 5 both sides of above equation
5*o=5*(120)+0
5o=600+0
5o-o=600
4o=600
divide by 4 both sides of the equation
4o/=600/4
o=150

Original Price = o = $150