100% - начальная
1. 100+р
2. 50+р
3. (50+р)*2=100+2р
4. 100+2р-р=93,75
р=6,25
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100% - начальная
1. 100+р
2. 50+р
3. (50+р)*2=100+2р
4. 100+2р-р=93,75
р=6,25