Adam has some money to buy some stickers.
If he buys 4 stickers, he will have $11 left.
If he buys 7 stickers, he will need $4 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 $11 that is left and get an extra of $4.
Difference in the amount to pay in both scenarios
= 11 + 4
= $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 4 stickers + 11
= 4 x 5 + 11
= 20 + 11
= $31
Answer(s): (a) $5; (b) $31