100.001 - (х + 44.864) = 31.587
100.001 - х - 44.864 = 31.587
55.137 - х = 31.587
55.137 - 31.587 = х
23.550 = х
х = 23.550
<u>проверка:</u>
100.001 - (23.550 + 44.864) = 31.587
100.001 - 68.414 = 31.587
31.587 = 31.587
8х-4х+16=21
4х=21-16
4х=5
х=5/4
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Готово!Удачи)))
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3 3/4 + 2 4/7 =
Приводим к общему знаменателю: 28
3 21/28 + 2 16/28 = 5 37/28 = 6 9/28