The first time Lamar buys 5 burgers and 9 sodas for a total price of $46.95
The second time, Lamar buys 10 burgers and 10 sodas for a total of $79.50
In this situation, there are three variables.
Two independent variables:
1- Cost of one burger
2- Cost of one soda
And one dependent variable
The total cost of the purchase.
To determine an equation system, x can represent the variable "Cost of one burger" and y can represent the variable "Cost of one soda"
Considering that the cost of burgers and sodas ordered are the explanatory variables and the total cost is the response variable, you can express the total cost of the first purchase as:
And the total cost of the second purchase can be expressed as the following equation
