Question

Ahmed is taking orders for lunch. A slice

of pizza costs $2.5 and a chicken
sandwich costs $3.5. He collects $21.5
for the group of 7 people.
Let x = number of pizza orders. Let
y = number of chicken orders.
PLEASE HELP

Answer 1

• x+y=7; 2.5x+3.5y=21.5
• (x, y) = (3, 4)

Explanation:

Perhaps you want a system of equations and their solution.

You have defined the variables, so you just need to write the relationships.

x + y = 7 . . . . we assume one order per person

2.50x + 3.50y = 21.50 . . . . we assume Ahmed collected just enough

__

Multiplying the first equation by 2.5 and subtracting that from the second equation, we get ...

(2.50x +3.50y) -2.5(x +y) = (21.50) -2.5(7)

y = 4

x = 7 -4 = 3

There were 3 pizza orders and 4 sandwich orders.