Answer:
6C + 1.50= 4.20
Explanation:
The cake is 1.50 dollars, and she buy 6 cupcakes, and we want to know how much each cupcake cost, so is 6 and C, let's C represent the cost of each cupcake, like in total she spend 4.20, the equation is 6C + 1.50 = 4.20, which is total to 0.45