Ответ:
\(18 \cdot 4 = 72\).
\(72 : 7 = \frac{72}{7}\), \(84 : 12 = 7\).
\(100 - (\frac{72}{7} + 49) + 7 = 107 - \frac{415}{7} = \frac{334}{7} = 47\frac{5}{7}\).
Ответ: \(47\frac{5}{7}\).
\(18 \cdot 4 = 72\).
\(72 : 7 = \frac{72}{7}\), \(84 : 12 = 7\).
\(100 - (\frac{72}{7} + 49) + 7 = 107 - \frac{415}{7} = \frac{334}{7} = 47\frac{5}{7}\).
Ответ: \(47\frac{5}{7}\).