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11 January, 19:03

A school ordered 3 large boxes of board markers. After giving 15 markers to each of 3 teachers, there were 90 markers left. The diagram represents the situation. How many markers were originally in each box?

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Answers (2)
  1. 11 January, 21:17
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    15 x 3 = 75 markers given to teachers

    75 + 90 = 165 markers in total

    165 : 3 = 55 markers per box (answer)
  2. 11 January, 22:42
    0
    Answer: 45 markers in each box.

    Step-by-step explanation:

    Initially, the school had 3 boxes of board markers, and each box had X board markers, where X is the number we want to find.

    Then the initial number of board markers is 3*X.

    We know that after giving 15 markers to 3 teachers, we have other 90 markers left. This can be written as:

    total markers = markers for the teachers + markers left

    3*X = 15*3 + 90 = 45 + 90 = 135

    now, we divide both sides by 3.

    X = 135/3 = 45

    From this, we know that in each box we have 45 markers
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