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27 September, 12:08

Which value of x makes the open sentence true? 7 - x = 3x + 5

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  1. 27 September, 12:13
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    7-x = 3x-2

    7-5 = 3x-x

    2 = 4x

    2/4=x

    1/2=x

    7-1/2=3*1/2+5

    14-1/2=3+10/2

    13/2=13/2
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