Question

robin has 180 stickers. how many pages of 10 stickers does she need so that she will have 200 stickers in all

Answer 1

For this case, the first thing we must do is define variables.

We have then:

x: number of pages

y: amount of total stickers

We write the expression that models the problem:

$y = 10x + 180$

For 200 stickers we have:

$10x + 180 = 200$

From here, we clear the value of x:

$10x = 200 - 180\\10x = 20$

$x = \frac{20}{10}\\x = 2$

Answer:

She needs 2 additional pages of 10 stickers to be able to have 200 stickers in total.

Answer 2

She will need 20 pages of stickers 10x20=200 just like 10x18=180 then 20-18=2 pages left