x + 4/2 + x + 1/5 = 1

x + x + 4/2 + 1/5 = 1

2x + 2/1 + 1/5 = 1

2x + 10/5 + 1/5 = 1

2x + 11/5 = 1

2x = 1 - 11/5

2x = -6/5

x = -3/5 = -0,6