doug paid 22 dollars for two books. One book cost 5 dollars more. How much did each book cost?

Question

word problem help needed. I need the formula to figure out this question. doug paid 22 dollars for two books. One book cost 5 dollars more. How much did each book cost?

thank you

Answer 1

Since we don't know how much doug paid for either book,

 

let x = price doug paid for the first book.

x + 5 = price doug paid for the second book.

 

x + x + 5 = 22 since the cost of both books was 22

2x + 5 = 22

2x = 17

x = 8.50

 

So one book cost $8.50 and the other cost $13.50.