I hope this helps you
x=3. (27x+2)
x=81x+6
80x=-6
x=-3/40
2.25 days i would assume if they each wat once a day. However there isn’t enough info because we dont know how often they’re eating.
16 ounces = 1 pound so 16 x 8 = 128 so 128 ounces is your answer
The amount of pizza Mark would have is

Find the common denominators first. 2/12 + 3/12 = 5/12. Two slices of the 6 slice pizza is 1/3 or 4/12.