Given the system of equations, what is the value of x + y? x + 2y = 24 2x + y = 9

11

Step-by-step explanation:

x + 2y = 24x = 24 - 2y

now sub 24 - 2y in for x, back into the other equation

2x + y = 9

2(24 -2y) + y = 9

48 - 4y + y = 9

-4y + y = 9 - 48

-3y = - 39

y = -39/-3

y =  13

x + 2y = 24

x + 2(13) = 24

x + 26 = 24

x = 24 - 26

x = -2

so the value of x + y = -2 + 13 = 11 <===