Answer:
3
Step-by-step explanation:
[tex] \\ \sf \: \frac{z - 2x}{y} [/tex]
[tex] \\ \sf \: = \frac{ (- 6) -2(3) }{ - 4} [/tex]
[tex] \\ \sf = \frac{ - 6 - 6}{ - 4} [/tex]
[tex] \\ \sf = \frac{ - 12}{ - 4} [/tex]
[tex] \\ \sf = 3[/tex]
[tex] \\ \sf \therefore \frac{z - 2x}{y} = {\boxed {3}}[/tex]
