2 + 3x / 5 - 1 + 2x / 4 + x/3 = 1 / 15
4(2 + 3x) - 5(1 + 2x) / 5 + x/3 = 1 / 15
8 + 12x - 5 - 10x /20 + x/3 = 1 / 15
2x + 3 / 20 + x/3 = 1 / 15
3(2x + 3) + 20x /60 = 1 / 15
6x + 9 + 20x /60 = 1 / 15
26x + 9 / 60 = 1 / 15
15(26x + 9) = 60 * 1
390x + 135 = 60
390x = -75
x = -75 / 390 = -5,2