1. A local pizzeria sells a small pizza with one topping for $6 and a small pizza with three toppings for $8.
What is the charge for a plain small pizza?
What is the price per topping?

2. Solution P + t = $6 P + 3t = $8 -t -t P = $6 – t ($6 – t) + 3t = $8
-6 -6
2t = $2
2 2
t = $1
Since P + t = $6, P +$1 = $6, so P = $5!

3. Example 1
5x + 4y = 5 y = 5x

4. Example 2
y = ½x – 8 y = -4x + 1

5. At an ice cream parlor, ice cream cones cost $1.10 and sundaes cost $ One day, the receipts for a total of 172 purchases were $ How many cones were sold?