Question

#7. Three friends each ordered two slices of pizza and a drink at the mall. If the drinks cost $1.70, and the total of their order was $21, how much did one slice of pizza cost?​

Answer 1

Explanation:

Let each slice of pizza = x

One person orders 2 slices of pizza which = 2x

3 people order 3 * 2x = 6x

Each person orders a drink at 1.70 per drink

3 people order a drink = 3 * 1.70 = 5.10

The total order is 21 dollars. So the left side of the equation will be

6x + 5.10 = 21 Subtract 5.10 from 21

- 5.10 5.10

6x = 15.90 Divide both sides by 6

6x/6 = 15.90/6

x = 2.65

Each slice of pizza costs $2.65