Answer:
Explanation:
Let the number of chefs is x and the number of customers is y.
Regular rolls
- Prepared 15x, eaten 2y, left 4
Equation:
Vegetarian rolls
- Prepared 20x, eaten 3y, left 1
Equation:
We have a system.
Solve it by elimination, multiply the first one by 4 and the second one by 3:
- 15x*4 = 2y*4 + 4*4 ⇒ 60x = 8y + 16
- 20x*3 = 3y*3 + 1*3 ⇒ 60x = 9y + 3
Compare the equations:
- 8y + 16 = 9y + 3
- 9y - 8y = 16 - 3
- y = 13
Substitute the value of y into first equation and solve for x:
- 15x = 2*13 + 4
- 15x = 30
- x = 2