Twenty people attended a going away party for Zach. The guest left in groups of 2.By 9:00,x groups had left. Rewrite the number of guests remaining at 9:00 as a sum.

The number of guests remaining at 9:00 is;

(20-2x)

Step-by-step explanation:

From the question, we are told that x groups have left

Since they are leaving in groups of 2, x groups means a total of x * 2 = 2x

So we have 2x left out of a total 20; the people remaining at the party will be;

20-2x

im guessing (23,14). hope this : )