Adam has some money to buy some stickers.
If he buys 3 stickers, he will have $13 left.
If he buys 13 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
= 13 - 3
= 10
To buy 10 stickers, he needs to use $13 that is left and get an extra of $7.
Difference in the amount to pay in both scenarios
= 13 + 7
= $20
Adam needs $20 to buy 10 extra stickers .
Cost of 10 stickers = $20
Cost of 1 sticker = 20 ÷ 10 = $2
(b)
Amount that he has
= Cost of 3 stickers + 13
= 3 x 2 + 13
= 6 + 13
= $19
Answer(s): (a) $2; (b) $19