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Ответ

Ответ дан
Katyamanova
400:34=(примерноj) 12%(соли)
240-228=12
240:12=20%(всхожести)

Ответ

Проверено экспертом

Ответ дан
prettypushkova
1) 34 * 100 : 400 = 8,5% - процент содержания соли в растворе

2) Пропорция: 240 семян - 100%
                         228 семян - х%
х = 228 * 100 : 240 = 95% - процент всхожести семян 
 

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