Adam has some money to buy some stickers.
If he buys 8 stickers, he will have $15 left.
If he buys 17 stickers, he will need $12 more.
- How much does each sticker cost?
- How much money does he have?
(a)
Difference in the number of stickers in both scenarios
= 17 - 8
= 9
To buy 9 stickers, he needs to use $15 that is left and get an extra of $12.
Difference in the amount to pay in both scenarios
= 15 + 12
= $27
Adam needs $27 to buy 9 extra stickers .
Cost of 9 stickers = $27
Cost of 1 sticker = 27 ÷ 9 = $3
(b)
Amount that he has
= Cost of 8 stickers + 15
= 8 x 3 + 15
= 24 + 15
= $39
Answer(s): (a) $3; (b) $39