Adam has some money to buy some stickers.
If he buys 9 stickers, he will have $15 left.
If he buys 11 stickers, he will need $7 more.
- How much does each sticker cost?
- How much money does he have?
(a)
Difference in the number of stickers in both scenarios
= 11 - 9
= 2
To buy 2 stickers, he needs to use $15 that is left and get an extra of $7.
Difference in the amount to pay in both scenarios
= 15 + 7
= $22
Adam needs $22 to buy 2 extra stickers .
Cost of 2 stickers = $22
Cost of 1 sticker = 22 ÷ 2 = $11
(b)
Amount that he has
= Cost of 9 stickers + 15
= 9 x 11 + 15
= 99 + 15
= $114
Answer(s): (a) $11; (b) $114