What is the solution???

So, what you want to do is graph the lines, and at the point at which the 2 lines intersect is the solution.

$9.89

step-by-step explanation:

9.90 = p x .06 x .25 (3/12 changed to a decimal)

9.90 = p x 0.015

9.90 - 0.015 = p

9.89 = p