Question

I’m having trouble understanding this can someone help please and thank you

Answer 1

A soda costed $3.50.

Explanation:

Step 1) We know that a slice of pizza and a soda costs $9 (from Kate's order). With a burger added (Billy's order) it would cost $13.50.

So a burger would cost $4.50:

`13.50-9=4.50`

Step 2) We also know a burger and a soda costs $8. So we subtract the cost of the burger from Louis' order to find the cost of the soda:

`8-4.50=3.50`

Cost of soda:
`\$3.50`