Bantu dong...pr buat besok. Pakai jalan ya

8)
(1-x)/4 + (3x-1)/6 = x/2 - 1 1/6
3(1-x)/12 + 2(3x-1)/12 = 6x/12 - 14/12
(3-3x + 6x-2)/12 = (6x-14)/12
(1+3x)/12 = (6x-14)/12
1/12 + 3x/12 = 6x/12 - 14/12
3x/12 - 6x/12 = -14/12 - 1/12
-3x/12 = -15/12
-3x = -15
x = -15/-3 = 5 .....jawabnya c