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21 March, 15:16

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

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  1. 21 March, 15:18
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    -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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