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Mathematics, 11.06.2021 01:00 moneygreen951

HELP PLEASE Angelika thought of a number N, multiplied it by 7, and added 9. Then she told the result to R to Lisa. In what range can N and R vary?

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HELP PLEASE Angelika thought of a number N, multiplied it by 7, and added 9. Then she told the resu...
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