Решите задачу:
x=-7,5
63х – 13.7 = 13(0.1 + 5х) 63х – 13.7 = 1.3 + 65х 63х – 65х = 1.3 + 13.7 – 2х = 15 х = – 15/2 = – 7 1/2 = – 7.5