(x + 5)/4 - (2x + 1)/8 = 1/2(2 - x) / * 8
2(x + 5) - (2x + 1) = 4(2 - x)
2x + 10 - 2x - 1 = 8 - 4x
2x - 2x + 4x = 8 - 10 + 1
4x = -1 / : 4
x = -1/4
