Giải thích các bước giải:
\(\begin{array}{l}
a.3x - 9 - 18 = 20 - 24x - 12x\\
\to 39x = 47\\
\to x = \frac{{47}}{{39}}\\
b.4x - 10 - 36x - 12 = x - 8\\
\to 33x = - 14\\
\to x = - \frac{{14}}{{33}}\\
c.16 - 6x - 4x = 8x - 24 - 24\\
\to 18x = 64\\
\to x = \frac{{32}}{9}\\
d.4x - 16 - 10x = 40 - 5x + 15\\
\to x = - 71
\end{array}\)