Adam has some money to buy some stickers.
If he buys 10 stickers, he will have $7 left.
If he buys 13 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
= 13 - 10
= 3
To buy 3 stickers, he needs to use $7 that is left and get an extra of $8.
Difference in the amount to pay in both scenarios
= 7 + 8
= $15
Adam needs $15 to buy 3 extra stickers .
Cost of 3 stickers = $15
Cost of 1 sticker = 15 ÷ 3 = $5
(b)
Amount that he has
= Cost of 10 stickers + 7
= 10 x 5 + 7
= 50 + 7
= $57
Answer(s): (a) $5; (b) $57