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3 November, 16:01

What is 10z-15-4z=8-2z-15?

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  1. 3 November, 17:45
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    10z-15-4z=8-2z-15

    6z-15=-7-2z

    +2z + 2z

    8z-15=-7

    +15 + 15

    8z=8

    8:8

    z=1
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