Adam has some money to buy some stickers.
If he buys 5 stickers, he will need $3 more.
If he buys 9 stickers, he will need $7 more.
- How much does each sticker cost?
- How much money does he have?
(a)
Difference in the number of stickers in both scenarios
= 9 - 5
= 4
Difference in the amount to pay in both scenarios
= 7 - 3
= $4
Adam needs $4 to buy 4 extra stickers.
Cost of 4 stickers = $4
Cost of 1 sticker = 4 ÷ 4 = $1
(b)
Amount that he has
= Cost of 5 stickers - 3
= 5 x 1 - 3
= 5 - 3
= $2
Answer(s): (a) $1; (b) $2