Đáp án:
\(x=6\)
Giải thích các bước giải:
\[\begin{array}{l}
x \times 2\frac{2}{1} + x \times \frac{1}{2} = 27\\
x \times 2.2 + \frac{x}{2} = 27\\
4x + \frac{x}{2}\,\,\,\,\,\,\,\,\,\, = 27\\
\frac{{8x}}{2} + \frac{x}{2}\,\,\,\,\,\,\,\,\, = 27\\
\,\,\,\,\,\,\,\,\frac{{9x}}{2}\,\,\,\,\,\,\,\,\,\,\, = 27\\
\,\,\,\,\,\,\,\,\,9x\,\,\,\,\,\,\,\,\,\,\, = 27 \times 2\\
\,\,\,\,\,\,\,\,\,9x\,\,\,\,\,\,\,\,\,\,\, = 54\\
\,\,\,\,\,\,\,\,\,\,\,\,x\,\,\,\,\,\,\,\,\,\,\, = 54:9\\
\,\,\,\,\,\,\,\,\,\,\,\,x\,\,\,\,\,\,\,\,\,\,\, = 6.
\end{array}\]
