Adam has some money to buy some stickers.
If he buys 9 stickers, he will have $13 left.
If he buys 12 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
= 12 - 9
= 3
To buy 3 stickers, he needs to use $13 that is left and get an extra of $5.
Difference in the amount to pay in both scenarios
= 13 + 5
= $18
Adam needs $18 to buy 3 extra stickers .
Cost of 3 stickers = $18
Cost of 1 sticker = 18 ÷ 3 = $6
(b)
Amount that he has
= Cost of 9 stickers + 13
= 9 x 6 + 13
= 54 + 13
= $67
Answer(s): (a) $6; (b) $67