Adam has some money to buy some stickers.
If he buys 9 stickers, he will have $19 left.
If he buys 18 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
= 18 - 9
= 9
Difference in the amount to pay in both scenarios
= 19 - 10
= 9
Adam needs $9 to buy 9 extra stickers.
Cost of 9 stickers = $9
Cost of 1 sticker = 9 ÷ 9 = $1
(b)
Amount that he has
= Cost of 9 stickers + 19
= 9 x 1 + 19
= 9 + 19
= $28
Answer(s): (a) $1; (b) $28