Question

When solving the system x + 2y = 9 and x - y = 6, which expression could be substituted for x in the second equation?

Answer 1

A. 9 - x
B. y - 9/2
C. 9 - 2y
D. 1/2 y + 9

Answer 2

x - y = 6
x = 6+y
x + 2y = 9
x = 9-2y

Answer 3

Thanks! :)

Answer 4

nom. questions. should be questioned! lol. I'm kidding.
do you understand why? understanding means you can do 100's of these whereas posting 100's of these is hard to respond to o_o