180 stickers are in 3 boxes.
The third box has 8 times as many stickers as the second box.
The first box is 10 less than the second box.
How many less stickers are there in the second box and the first box than in the third box?
Choose the box with the least stickers to be 1 u.

Number of stickers in the first box = 1 u
Number of stickers in the second box = 1 u + 10
Number of stickers in the third box = 8 x (1 u + 10) = 8 u + 80

Total number of stickers
= 8 u + 80 + 1 u + 10 + 1 u
= 8 u + 1 u + 1 u + 80 + 10
= 10 u + 90

10 u + 90 = 180
10 u = 180 - 90
10 u = 90

1 u = 90 ÷ 10 = 9

Number of less stickers in the second box and first box than the third box
= (8 u + 80) - (1 u + 10 + 1 u)
= (8 u + 80) - (2 u + 10)
= 8 u - 2 u  + 80 - 10
= 6 u + 70
= 6 x 9 + 70
= 54 + 70
= 124

Answer(s): 124