Charlie has some money to buy some stickers.
If he buys 5 stickers, he will have $11 left.
If he buys 7 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
= 7 - 5
= 2
Difference in the amount to pay in both scenarios
= 11 - 7
= 4
Charlie needs $4 to buy 2 extra stickers.
Cost of 2 stickers = $4
Cost of 1 sticker = 4 ÷ 2 = $2
(b)
Amount that he has
= Cost of 5 stickers + 11
= 5 x 2 + 11
= 10 + 11
= $21
Answer(s): (a) $2; (b) $21