Step-by-step explanation:
4x-3y=-1
4x+y=11
[tex]4x = - 1 + 3y \\ x = \frac{ - 1 + 3y}{4} [/tex]
[tex] - 1 + 3y = 11 - y \\ 3y + y = 11 + 1 \\ 4y = 12 \\ y = 3[/tex]
[tex]x = \frac{ - 1 + 3 \times 3}{4} \\ x = \frac{ - 1 + 9}{4} \\ x = \frac{8}{4} = 2[/tex]
