Решите уравнение: в) 23,5-(2,3а+1,2а)=19,3
23.5 - (2.3a + 1.2a) = 19.3 23.5 - 3.5a = 19.3 -3.5a = 19.3 - 23.5 -3.5a = -4.2 3.5a = 4.2 a = 4.2/3.5 a = 0.6/0.5 a = 6/5 a = 1.2