July 2022 1 3 Report
в 400 грамм солевом растворе имеется m грамм соли. Концентрация соли в растворе сколько процентов (р%) ? Используя форму пропорцию найдите р% при m=72 грам
1)15%
2)18%
3)30%
4)38%​
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