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29 June, 14:23

11 + ? * 7 - ? = - 21

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  1. 29 June, 15:17
    0
    Rewrite as

    11 + (7x) - x=-21

    11+6x=-21

    6x=-32

    X = - 32/6 = - 16/3

    Check:

    11 + (-16/3*7) + 16/3=

    11-112/3+16/3=

    11-96/3=

    11-32=

    -21 it works

    So ... ? = - 16/3
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