6.252 Решите уравнение:

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