Adam has some money to buy some stickers.
If he buys 9 stickers, he will have $7 left.
If he buys 18 stickers, he will need $11 more.
- How much does each sticker cost?
- How much money does he have?
(a)
Difference in the number of stickers in both scenarios
= 18 - 9
= 9
To buy 9 stickers, he needs to use $7 that is left and get an extra of $11.
Difference in the amount to pay in both scenarios
= 7 + 11
= $18
Adam needs $18 to buy 9 extra stickers .
Cost of 9 stickers = $18
Cost of 1 sticker = 18 ÷ 9 = $2
(b)
Amount that he has
= Cost of 9 stickers + 7
= 9 x 2 + 7
= 18 + 7
= $25
Answer(s): (a) $2; (b) $25