Charlie has some money to buy some stickers.
If he buys 9 stickers, he will have $21 left.
If he buys 11 stickers, he will have $7 left.
- How much does each sticker cost?
- How much money does he have?
(a)
Difference in the number of stickers in both scenarios
= 11 - 9
= 2
Difference in the amount to pay in both scenarios
= 21 - 7
= 14
Charlie needs $14 to buy 2 extra stickers.
Cost of 2 stickers = $14
Cost of 1 sticker = 14 ÷ 2 = $7
(b)
Amount that he has
= Cost of 9 stickers + 21
= 9 x 7 + 21
= 63 + 21
= $84
Answer(s): (a) $7; (b) $84