Answer:
D
Step-by-step explanation:
[tex]x = 5 - 2y \\ y = 3(5 - 2y) - 8 \\ y = 15 - 6y - 8 \\ y = 7 - 6y \\ 7y = 7 \\ y = 1[/tex]
[tex]x = 5 - 2y \\ x = 5 - 2 = 3 \\ [/tex]
D is right (there is exactly one soution at (3,1))
x+2y=5
3+2(1)=5
y=3x-8
1=3(3)-8
