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