We can solve this problem by using a system of equations.
Let's call X chocolate, and Y icecream cones.
The first scenario is 3 chocolate and 2 Ice cream, so we can model this scenario using the following expression
3x+2y
We can model the second scenario by the following expression:
9x.
So we set the two equal to each other.
3x+2y=9x
2y=6x
y=3x
So we know that for every 3 chocolates, we can buy 1 ice cream.
So, if we can buy 9 chocolates, that means we can buy 3 ice creams.
(9 divided by 3)
