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17 July, 16:22

How much sand do you need to add to 4 m³ of soil with 50% sand in order to make soil with 80% sand?

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  1. 17 July, 16:56
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    6m^3

    Step-by-step explanation:

    Again with the buckets.

    50+100=80

    04 + x = 4+x

    200+100x=320+80x

    20x=120

    x=6
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