Adam has some money to buy some stickers.
If he buys 2 stickers, he will have $9 left.
If he buys 7 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
= 7 - 2
= 5
To buy 5 stickers, he needs to use $9 that is left and get an extra of $11.
Difference in the amount to pay in both scenarios
= 9 + 11
= $20
Adam needs $20 to buy 5 extra stickers .
Cost of 5 stickers = $20
Cost of 1 sticker = 20 ÷ 5 = $4
(b)
Amount that he has
= Cost of 2 stickers + 9
= 2 x 4 + 9
= 8 + 9
= $17
Answer(s): (a) $4; (b) $17