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The local restaurant has the following offers:

2 sandwiches and juice
€5.00
OFFER A
Sandwich and salad
€5.10
OFFER B
Salad and juice
€5.30
OFFER C

What is the cost of one sandwich?


What is the cost of 1 sandwich 1 salad and 1 juice?

Respuesta :

Answer:

Below in bold.

Step-by-step explanation:

Let cost of sandwich = s,  juice = j and salad = d.

2s + j = 500     (A)

s + d = 510       (B)

d + j =  530      (C)

Equation  (C) - (B)   ( to eliminate d):

j - s = 20          (D)

(A)  - (D) =   (to eliminate j):

2s - (-s) = 480

3s = 480

s = 160

A sandwich costs E 1.60.

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