4 ( 1 - 2x ) - 3 + x = 8 - x
<=> 4 - 8x - 3 + x = 8 - x
<=> -8x + x + x = 8 - 4 + 3
<=> -6x = 7
<=> x = -7/6
4(1 - 2x) - 3 + x = 8 - x
4 - 8x - 3 + x = 8 - x
1 - 7x = 8 - x
1 - 8 = -x + 7x
6x = -7
x = -7/6
4(1 - 2x) - 3 + x = 8 - x
4 - 8x - 3 + x = 8 - x
1 - 7x = 8 - x
1 - 8 = -x + 7x
6x = -7
x = -7/6
hok tốt