Question

Zachary and his children went into a bakery and he bought $15 worth of cupcakes and brownies. Each cupcake costs $3 and each brownie costs $1.50. He bought 3 times as many brownies as cupcakes. Determine the number of cupcakes and the number of brownies that Zachary bought.

Answer 1

6 brownies and 2 cupcakes.

Explanation:

Let the number of brownies be b and the number of cupckes be c.

We have the following system:

b = 3c

1.5b + 3c = 15

Substituting for b in the second equation:

4.5c + 3c = 15

7.5c = 15

c = 2.

Thus b = 3c = 6.

Answer 2

Explanation:

the answer is

Y=2.5

X=3.75