Respuesta :

Try modeling it as an equation.
[tex]6x - 4 = 40[/tex]
[tex]6x = 44[/tex]
Thus, x = 44/6.
Your answer is -6. Here is my work:

4-6x=40
4-6x-4=40-4
-6x=36
-6x/-6=36/-6
x=-6.