Rebecca wants to put 544 pennies in a coin collection book the blue book fits nine pennies per page the red book fits seven pennies per page how many more pages would she need if she used the red book rather than the blue one

Set up the following equations:




x represents the amount of blue books needed, and y represents the amount of red books needed.

Solve the first equation by dividing both sides by 9:




Rebecca would need 61 pages if she used the blue book.

Solve the second equation by dividing both sides by 7:




Rebecca would need 78 pages if she used the red book.

Subtract the red book's pages from the blue book's pages:



Rebecca would need 17 more pages if she used the red book instead of the blue book.