19. Make sense of problems. Keisha bought a discount pass at a movie theater. It entitles her to a special discounted admission price for every
movie she sees. Keisha wrote an equation that gives the total cost y of
seeing x movies. In standard form, the equation is 7x – 2y = -31.
a. What was the cost of the pass?
b. What is the discounted admission price for each movie?
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