Adam has some money to buy some stickers.
If he buys 4 stickers, he will have $15 left.
If he buys 7 stickers, he will need $6 more.
- How much does each sticker cost?
- How much money does he have?
(a)
Difference in the number of stickers in both scenarios
= 7 - 4
= 3
To buy 3 stickers, he needs to use $15 that is left and get an extra of $6.
Difference in the amount to pay in both scenarios
= 15 + 6
= $21
Adam needs $21 to buy 3 extra stickers .
Cost of 3 stickers = $21
Cost of 1 sticker = 21 ÷ 3 = $7
(b)
Amount that he has
= Cost of 4 stickers + 15
= 4 x 7 + 15
= 28 + 15
= $43
Answer(s): (a) $7; (b) $43