What does -72/-9 evaluate

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?

100 points and 1- -12=y-36 2- x/25=-25 3- -n=40

Each flyer costs $0.25. our total budget is $555. it will cost $115 for other supplies. about how many flyers do you think we can buy? a.)less than 1,000 flyers b.)between 1,000 and 2,000 flyers c.)10,000 flyers d.)greater than 2,000 flyers