3. Решите уравнение: a) x + 8.55 = 19; б) 97.19 - х = 8.581; в) x - 77.558 = 20.442; г) x + 3.43 = 9.6.

a) (x + 8.55 = 19) (x = 19 - 8.55) (x = 10.45) б) (97.19 - x = 8.581) (x = 97.19 - 8.581) (x = 88.609) в) (x - 77.558 = 20.442) (x = 20.442 + 77.558) (x = 98) г) (x + 3.43 = 9.6) (x = 9.6 - 3.43) (x = 6.17)