6.252 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) 11x = 1,98; x = 1,98 / 11 = 0,18

б) 4z = 5,52; z = 5,52 / 4 = 1,38

в) 7t = 25,3 - 3,18 = 22,12; t = 22,12 / 7 = 3,16

г) 6p = 75,19 + 14,21 = 89,4; p = 89,4 / 6 = 14,9