[tex]y = x - 5[/tex]
Substitute y in the x+3y=9
[tex]x + 3(x - 5) = 9 \\ x + 3x - 15 = 9 \\ 4x = 9 + 15 \\ 4x = 24 \\ x = 6[/tex]
Substitute x = 6 in any given equations. I will choose to substitute in y = x-5
[tex]y = x - 5 \\ y = 6 - 5 \\ y = 1[/tex]
The answer is (6,1)
