Question

Louie made 8.1 liters of fruit punch using only grape juice and carbonated water. He used 4.2 liters of grape juice. The equation 4.2 + c = 8.1 can be used to represent this situation, where c is the number of liters of carbonated water used. How many liters of carbonated water did Louie use?

Answer 1

Given:

The equation is:

`4.2+c=8.1`

Where c is the number of liters of carbonated water used.

To find:

How many liters of carbonated water did Louie use?

Solution:

We have,

`4.2+c=8.1`

We need to solve this equation for c to find the number of liters of carbonated water used by Louie.

Subtracting 4.2 from both sides, we get

`4.2+c-4.2=8.1-4.2`

`c=3.9`

Therefore, Louie used 3.9 liters of carbonated water.