Answer :
EXPLANATION
Since we have 8 machines, we can apply the following relationship:
[tex]\frac{8}{12}=\frac{x}{6}[/tex]Multiplying both sides by 6:
[tex]6\cdot\frac{8}{12}=x[/tex]Multiplying numbers:
[tex]\frac{48}{12}=x[/tex]Simplifying:
[tex]4=x[/tex]