.7
because you need to get the original unit price which is 0.7 then multiply that by 1 and get your answer
No, probably is on a scale between 0 and 1. Anything beyond those numbers is mathematically impossible. Since 3/2 = 1.5, it is not valid
The answer is x=22 because you just have to add the two equations together and then solve for 8x+4=180
