Question

At a restaurant, 28 people had lunch on Sundayat noon.1/7 of them had a hot dog1/4 of them had a hamburgerThe remaining people had pizza.How many people had pizza?

Answer 1

17

Explanation:

We can calculate the number of people who had pizza using the following equation:

Let x be the number of people who had pizza:

`\begin{gathered} (1)/(7)\cdot28+(1)/(4)\cdot28+x=28 \\ \text{ solving for x} \\ 4+7+x=28 \\ x=28-4-7 \\ x=17 \end{gathered}`

The number of people who had pizza was 17