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19 December, 15:56

If you take a number and add a zero to the right and subtract the result from 143, you'll get three times the original number. what is the number

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  1. 19 December, 16:56
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    Let the number be n.

    Adding a zero means multiplying the number by 10, 10n.

    143-10n=3n, 13n=143 so n=11.
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