Answer :
Give:
[tex]\begin{gathered} x=8 \\ y=6 \\ 2x-(4+y) \end{gathered}[/tex]So value of 2x-(4+y) is:
[tex]\begin{gathered} =2x-(4+y) \\ put\text{ the value of x=8 and y=6} \\ =2(8)-(4+6) \\ =16-(10) \\ =16-10 \\ =6 \end{gathered}[/tex]The value is 6.