Adam has some money to buy some stickers.
If he buys 9 stickers, he will have $13 left.
If he buys 16 stickers, he will need $8 more.
- How much does each sticker cost?
- How much money does he have?
(a)
Difference in the number of stickers in both scenarios
= 16 - 9
= 7
To buy 7 stickers, he needs to use $13 that is left and get an extra of $8.
Difference in the amount to pay in both scenarios
= 13 + 8
= $21
Adam needs $21 to buy 7 extra stickers .
Cost of 7 stickers = $21
Cost of 1 sticker = 21 ÷ 7 = $3
(b)
Amount that he has
= Cost of 9 stickers + 13
= 9 x 3 + 13
= 27 + 13
= $40
Answer(s): (a) $3; (b) $40