1091. Раскройте скобки: 1) -12(a-b+): 24 2) (164+8b-c-d)-(-n);

1. -12(\frac{5}{6}a - \frac{1}{4}b + \frac{7}{24}c - \frac{1}{12}) = -12 \cdot \frac{5}{6}a + 12 \cdot \frac{1}{4}b - 12 \cdot \frac{7}{24}c + 12 \cdot \frac{1}{12} = -10a + 3b - \frac{7}{2}c + 1 = -10a + 3b - 3,5c + 1
2. (\frac{16}{9}a + \frac{8}{9}b - \frac{5}{9}c - \frac{4}{9}d) \cdot (-\frac{9}{32}n) = \frac{16}{9}a \cdot (-\frac{9}{32}n) + \frac{8}{9}b \cdot (-\frac{9}{32}n) - \frac{5}{9}c \cdot (-\frac{9}{32}n) - \frac{4}{9}d \cdot (-\frac{9}{32}n) = -\frac{1}{2}an - \frac{1}{4}bn + \frac{5}{32}cn + \frac{1}{8}dn = -\frac{1}{2}an - \frac{1}{4}bn + \frac{5}{32}cn + \frac{1}{8}dn

Ответ: 1) -10a + 3b - 3,5c + 1; 2) -\frac{1}{2}an - \frac{1}{4}bn + \frac{5}{32}cn + \frac{1}{8}dn