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

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