In one year, a school uses 13,280 pieces of white paper, 5,580 fewer pieces of blue paper than white paper, and 3,400 fewer pieces of yellow paper than blue paper. How many pieces of paper does the school use in all?

The school uses 25,280 pieces of paper in total.

Explanation:

To determine the pieces of paper that the school uses in total, the following equation must be performed:

White: 13,280

Blue: 13,280 - 5,580

Yellow: 13,280 - 5,580 - 3,400

White + Blue + Yellow = X

13,280 + 13,280 - 5,580 + 13,280 - 5,580 - 3,400 = X

(13,280 x 3) - (5,580 x 2) - 3,400 = X

39,840 - 11,160 - 3,400 = X

25,280 = X

Therefore, the school uses 25,280 pieces of paper in total.

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