The cost of your new book bag is $11.50 more than the cost c of your old book bag. you pay $47 for your new book bag. write and solve an equation to find the cost of your old book bag. include units in your answer.

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest