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16 December, 13:19

X-7; x=23 and 3a-b; a=4, b=6

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  1. 16 December, 14:13
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    23-7=16

    3 (4) - 6

    () = multiplication

    3 (4) = 12

    12-6=6

    So 16 for the first one and 6 for the second one
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