Question

Chelsea was going to sell all of her stamp collection to buy a video game. After selling half of them she changed her mind. She then bought seven more how many did she start with if she has now 24? Solve in Two steps.

Answer 1

24-7=16
16×2=32
32 stamps

Answer 2

Chelsea initially had 34 stamps.

Explanation:

Let Chelsea initially had x stamps.

Now, she sold half of this amount.

Thus, number of stamps left =
`x-(x)/(2)=(x)/(2)`

Now, it has been given that she bought seven more stamps.

Hence, now she have
`(x)/(2)+7` stamps.

Also, it has been given that she has now 24 marbles.

Thus, we have the equation

`(x)/(2)+7=24`

Solve this equation for x

`(x)/(2)=17\\\\x=34`

Therefore, Chelsea initially had 34 stamps.