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11 October, 21:36

Complete 2x+21 = using only the communtative property of addition

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  1. 11 October, 23:45
    0
    -9.5

    Step-by-step explanation:

    2x + 21 =

    2x + 20 = 1 (C. P)

    2x = 1-20

    2x = - 19

    x = - 19/2

    x = - 9. 5
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