Let,
x = number of drinks/número de bebidas
y = number of popcorn/número de palomitas de maíz
z = number of tickets/número de entradas
A = price of drinks/precio de las bebidas
B = price of popcorn/precio de las palomitas de maíz
C = price of tickets/precio de las entradas
T = total cost/coste total
We get,
![\text{ T = Ax + By + Cz}](https://img.qammunity.org/2023/formulas/mathematics/college/4ad704k8vryj1rqph6ufksqq3vfw22t23q.png)
But,
x, y, z = 2
B = 2.25
C = 12.50
T = 33.00
Conectemos los valores a la fórmula para poder determinar el precio de las bebidas.
![\text{ T = Ax + By + Cz }\rightarrow\text{ 33 = A(2) + (2.25)(2) + (12.50)(2)}](https://img.qammunity.org/2023/formulas/mathematics/college/iqlibcizcmd8unru7sg5dkq2gu4p04q3dy.png)
![\text{33 = A(2) + (2.25)(2) + (12.50)(2) }\rightarrow\text{ 33 = 2A + 4.50 + 25.00}](https://img.qammunity.org/2023/formulas/mathematics/college/mfmu1c0byzi8lz0ygbab1owwon3v58pkfy.png)
![\text{ 33 = 2A + 29.5 }\rightarrow\text{ 2A = 33 -29.5 }\rightarrow\text{ 2A = 3.50}](https://img.qammunity.org/2023/formulas/mathematics/college/4i4n4giqdlgp2bv16yvm3dltocnx456twv.png)
![\text{ A = }(3.50)/(2)\text{ = 1.75}](https://img.qammunity.org/2023/formulas/mathematics/college/h6haga5353549k3y92gvcgjl33s25gmyrk.png)
Por tanto, el coste de las bebidas es 1.75.