So, 30% is 0.30, but since you are taking off 30%, you are going to have 70% of the price which is 0.70. The word "of" lets you know that you are going to multiply. So, what you do is 150•0.70=105. The discounted price is $105
15x+40=115
15x+40-40=115-40
15x=75
15/15 x=75/15
x= 5
The Answer Is 57.92 But the easiest way to do it is Rounding it
Nobody wants to do these because, I don't know why.