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7 January, 22:55

From the set {1, 3, 5}, use substitution to determine which value of x makes the equation true.

20 - 2x = 10

5

1

3

none of these

+3
Answers (1)
  1. 7 January, 22:58
    0
    {1,3,5}

    ie, sub 1, 3 and 5 for x and see which one is true

    20-2 (1) = 10

    20-2=10

    18=10

    false

    20-2 (3) = 10

    20-6=10

    14=10

    false

    20-2 (5) = 10

    20-10=10

    10=10

    true

    answer is 5
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