Giải thích các bước giải:
\(\begin{array}{l}
a.x = - \frac{7}{3}\\
b.2x - 6 - 6x = 7 - 2 + 3x\\
\to 7x = - 11\\
\to x = \frac{{ - 11}}{7}\\
c.6{x^2} - 12x - 5 = 6{x^2} - x + 3\\
\to 11x = - 8\\
\to x = - \frac{8}{{11}}\\
d.8{x^2} + 2x - 15 - 6 = 8{x^2} - 6x + 4\\
\to 8x = 25\\
\to x = \frac{{25}}{8}\\
e.4{x^2} - 10x + 25 - 3x = 5 - 3 + 4{x^2} + 6x\\
\to 19x = 23\\
\to x = \frac{{23}}{{19}}\\
f.25 - 20x + 4{x^2} - 9 = 4{x^2} - 6x + 5\\
\to 14x = 11\\
\to x = \frac{{11}}{{14}}
\end{array}\)
