Given the system of equations, what is the value of x + y?

x + 2y = 24
2x + y = 9
A) 9
B) 11
C) 15
D) 26

The first hexagon is dilated to form the second hexagon select the answers from the drop box menus to correctly complete the statement

You had $235 in your savings account nine weeks ago. you withdrew the same amount each week for 8 straight weeks. your balence was then $75. solve the equation 235 - 8m=75 to find how much money m you withdrew from your account each week. 2 points

How do you figure out which order to do two step equations in? like which thing do you subtract/add/multiply/divide first? i understand that you do the opposite of whatever's shown on the opposite side, but when?