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.

a) \(4x + 7x = 1,98\) \(11x = 1,98\) \(x = \frac{1,98}{11} = 0,18\) б) \(9z - 5z = 5,52\) \(4z = 5,52\) \(z = \frac{5,52}{4} = 1,38\) в) \(2t + 5t + 3,18 = 25,3\) \(7t = 25,3 - 3,18 = 22,12\) \(t = \frac{22,12}{7} = 3,16\) г) \(8p - 2p - 14,21 = 75,19\) \(6p = 75,19 + 14,21 = 89,4\) \(p = \frac{89,4}{6} = 14,9\)