Solve the system using elimination. y – x = 13 7y + x = 11

Ineed to learn how to solve this problem

Problem fathi wants to print out a pdf document that is 48 pages long. to save paper, he decides to print on both sides of each sheet and to print two pages on each side of the sheet. how many sheets of paper will he need?

30 ! the graph shows the number of siblings different students have. select from the drop-down menus to correctly complete the statement.