[tex]1 - 2(x - 4) = 4x - 3(2 - 5x) \\ 1 - 2x + 8 = 4x - 15x - 6\\ - 2x + 9 = 19x - 6 \\ - 2x = 19x - 6 - 9 \\ - 2x = 19x - 15 \\ - 2x -19x =-15 \\ - 21x = - 15 \\ \frac{ - 21x}{ - 21} = \frac{ - 15}{ - 21} \\ \\ x = \frac{5}{7} [/tex]
[tex]LA \: \: INCÓGNITA \: \: X \: \: VALE \: \frac{5}{7} [/tex]