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28 February, 07:53

Write an equation for the following problem. Then solve the equation and answer the problem.

Find three consecutive integers whose sum is 21.

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Answers (2)
  1. 28 February, 10:09
    0
    Let consecutive integers a-1; a; a+1, then

    a-1+a+a+1=21

    3 а=21

    a=7.

    7-1=6; 7+1=8.

    Answer: 6; 7; 8.
  2. 28 February, 10:23
    0
    Let the 3 numbers be x, x + 1 and x + 2, So:-

    x + x + 1 + x + 2 = 21

    3x = 21 - 3 = 18

    x = 18/3 = 6

    The 3 numbers are 6, 7 and 8 Answer
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