6.251 Найдите корень уравнения: a) 21z = 0,21; в) 317,8: (n - 5) = 14; б) 2,64 : a= 4; г) 38(x + 1,3) = 64,6.

Ответ:

1. a) \(21z = 0.21\) \[z = \frac{0.21}{21} = 0.01\]
2. б) \(2.64 : a = 4\) \[a = \frac{2.64}{4} = 0.66\]
3. в) \(317.8 : (n - 5) = 14\) \[n - 5 = \frac{317.8}{14}\] \[n - 5 = 22.7\] \[n = 22.7 + 5 = 27.7\]
4. г) \(38(x + 1.3) = 64.6\) \[x + 1.3 = \frac{64.6}{38}\] \[x + 1.3 = 1.7\] \[x = 1.7 - 1.3 = 0.4\]

Ответ: а) 0.01, б) 0.66, в) 27.7, г) 0.4