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4 November, 17:06

5y - 3z + 4y - 1z - 3y; y = 3 and z = - 2

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  1. 4 November, 17:21
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    5 (3) - 3 (-2)

    15 - (-6) =

    15+6=21

    a negative plus a negative is a positive so its 21

    4 (3) - 3 (-2)

    12 - (-6)

    12+6=18

    21+18=39
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