6.251 Решите уравнение: a) 4x + 7x = 1,98; б) 9z - 5z = 5,52; в) 2t + 5t + 3,18 = 25,3; г) 8p - 2p - 14,21 = 75,19.

Решение: a) \(4x + 7x = 1.98\) \(11x = 1.98\) \(x = \frac{1.98}{11} = 0.18\) Ответ: **0,18** б) \(9z - 5z = 5.52\) \(4z = 5.52\) \(z = \frac{5.52}{4} = 1.38\) Ответ: **1,38** в) \(2t + 5t + 3.18 = 25.3\) \(7t = 25.3 - 3.18 = 22.12\) \(t = \frac{22.12}{7} = 3.16\) Ответ: **3,16** г) \(8p - 2p - 14.21 = 75.19\) \(6p = 75.19 + 14.21 = 89.4\) \(p = \frac{89.4}{6} = 14.9\) Ответ: **14,9**