March 2023 1 1 Report
6 класс. Смешали вместе два раствора соли. 5 литров с концентрацией соли 42% и 2 литра с концентрацией 6%. Какова концентрация нового раствора?
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4x+2=23 4). 15x-123=102 5). 35-5x=20 6). 15-3a=3 7). 4,8-4m=1,6
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