Question

Sean buys 7 postcards to send to his friends. He also buys a t-shirt for $15.89 to give to his best friend. He pays a total of $19.32. Write an equation to find how much each postcard costs.

7p + [2] = []​

Answer 1

Let's say that the cost of each postcard is "p".

We can write the equation as follows:

7p + 15.89 = 19.32

If we solve for "p", we get:

7p = 19.32 - 15.89

p = 3.43 / 7

p = $<<3.43/7=0.49>>0.49

Therefore, each postcard costs $0.49.