Question

At ABC shop, 3 hamburgers and 2 cool drinks cost $89, whereas 2 hamburgers and 3 cool drinks cost $73. Determine the cost of 1 hamburger

Answer 1

H=cost of hamburger, D=cost of cool drink.

3H+2D=89,

2H+3D=73.

Multiply first equation by 3 and the second by 2:

9H+6D=267,

4H+6D=146.

Subtract:

5H=121, H=121/5=$24.20.

Cost of one hamburger is $24.20.

(Drink cost $8.20)