Answer:
Assistant manager sal= $800
cook sal = $400
server sal = 300
Explanation:
lets say 3 people salaries are x, y and z respectively
let x be the cook salary
cook salary = x
assistant manager sal = y = 2x
server sal = z = x - 100
putting in the equation total salary three together make = 1500
x+y+z = 1500
x+2x+(x-100) = 1500
4x -100 = 1500
4x = 1600
x = 400
y = 2x = 2x400 = 800
z = x - 100 = 400 - 100 = 300