1.) the sum of two numbers is 51 and the difference is 23. what are the numbers?

lager number:
smaller number:

2.) maya bought some books for $4 each and received a discount of $5 off of her total purchase. she spent $71 after the discount. how many books did she buy?

a. write an equation that could be used to answer the question above. first, choose the appropriate form ( +,- )with the numbers 4,5 and 71. let b represent the number of books.

b. solve the equation in part (a) to find the number of books?