Answer: Let's use the given information to set up two equations using x and y as variables:
From the first statement, we know that Samia paid $15 for 6 pens and 3 cards. Let's set up an equation to represent this:
6y + 3x = 15
Similarly, from the second statement, we know that Mohammed paid $9 for 2 cards and 5 pens. Let's set up an equation to represent this:
5y + 2x = 9
So the two equations that represent the situation are:
6y + 3x = 15
5y + 2x = 9
Note that we could have chosen to use different variables, but the important thing is that we use the same variables consistently in each equation.
Explanation: