Answer :
Let us assume that the other entries sold as at 9pm is x
This gives the number of steak sold up to that time as x+50
Let's find x.
[tex]\begin{gathered} x+(x+50)=200 \\ 2x+50=200 \\ \text{Subtracting 50 from both sides gives us:} \\ 2x+50-50=200-50 \\ 2x=150 \\ \text{Dividing both sides by 2 gives} \\ \frac{2x}{2}=\frac{150}{2} \\ x=75 \\ (x+50)=125 \end{gathered}[/tex]Total steak sold that is greater than 50% of total entrées sold is 125.