A student received a coupon for 18​% off the total purchase price at a clothing store. Let c be the original price of the purchase. Use the expression below for the new price of the purchase. Write an equivalent expression by combining like terms. c - 0.18c? i need answers fast

(05.03 mc) part a: explain why the x-coordinates of the points where the graphs of the equations y = 4x and y = 2x−2 intersect are the solutions of the equation 4x = 2x−2. (4 points) part b: make tables to find the solution to 4x = 2x−2. take the integer values of x between −3 and 3. (4 points) part c: how can you solve the equation 4x = 2x−2 graphically? (2 points)