75(x-2) where x represents the amount originally paid
3.21 it should be at least
To decrease something at 100% by 7% is:
100% - 7% = 93%
You multiply the original value by 0.93 to decrease it from it's original value by 7%
Each eraser will cost u 50 cents
so 7 erasers will cost (7 * 0.50) = 3.50 <==
