y = –3x + 6
y = 9
What is the solution to the system of equations?
(–21, 9)
(9, –21)
(–1, 9)
(9, –1)

+1

(2) Answers

Sframe

It is given that y=9, this narrows down our answer choices.
(x,9)
B and D can't be the answers due to the fact the y-coordinate isn't 9.
Let's try A.
Plug in 9 for y then solve for x:
9 = –3x + 6
Subtract 6 on both sides to get:
3=-3x
x=-1
A is not the answer.
That leaves us with C and C is the answer because x=-1 and y=9
Final answer: C (-1,9)