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