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2. At the gas station, three small drinks and two large drinks contain 108 ounces ofcola. A small drink contains a third as much cola as a large drink. How much coladoes each size drink contain?

Sagot :

Let x = small drinks

Let y = large drinks

3 small drinks and 2 large drinks contain 108 ounces of cola, this is:

3x + 2y = 108

A small drink contains a third as much cola as a large drink, this is:

x = 1/3y

Then, we solve the system of equations:

[tex]\begin{gathered} 3x+2y=108 \\ x=\frac{1}{3}y \end{gathered}[/tex]

First, substitute x in equation 1:

[tex]3(\frac{1}{3}y)+2y=108[/tex]

And solve for y:

[tex]\begin{gathered} y+2y=108 \\ 3y=108 \\ \frac{3y}{3}=\frac{108}{3} \\ y=36 \end{gathered}[/tex]

Next, substitute y = 36 in x:

[tex]x=\frac{1}{3}y=\frac{1}{3}(36)=12[/tex]

Answer:

Small drinks: 12 ounces of cola

Large drinks: 36 ounces of cola