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10 February, 19:49

Suma dintre treimea unui numar si numarul insusi este egala cu 28. afla numarul.

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  1. 10 February, 23:37
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    Let be x the number;

    We have (1/3) * x + x = 28;

    x/3 + 3x/3 = 84/3;

    4x = 84;

    x = 84 : 4;

    x = 21.
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