Charlie has some money to buy some stickers.
If he buys 8 stickers, he will have $17 left.
If he buys 15 stickers, he will have $10 left.
- How much does each sticker cost?
- How much money does he have?
(a)
Difference in the number of stickers in both scenarios
= 15 - 8
= 7
Difference in the amount to pay in both scenarios
= 17 - 10
= 7
Charlie needs $7 to buy 7 extra stickers.
Cost of 7 stickers = $7
Cost of 1 sticker = 7 ÷ 7 = $1
(b)
Amount that he has
= Cost of 8 stickers + 17
= 8 x 1 + 17
= 8 + 17
= $25
Answer(s): (a) $1; (b) $25