2 câu trả lời
Đáp án:
Giải thích các bước giải: \[\begin{array}{l} - \frac{3}{4}:\frac{x}{{{6^2}}} = 1,{5^3}.8\\ \Leftrightarrow - \frac{3}{4}:\frac{x}{{36}} = \frac{{27}}{8} \cdot 8\\ \Leftrightarrow - \frac{3}{4}:\frac{x}{{36}} = 27\\ \Leftrightarrow \frac{x}{{36}} = - \frac{3}{4}:27\\ \Leftrightarrow \frac{x}{{36}} = - \frac{1}{{36}}\\ \Leftrightarrow x = - 1 \end{array}\]
$
- \frac{3}{4}:\frac{x}{{{6^2}}} = 1,{5^3}.8\left( {x \ne 0} \right)\\
\Leftrightarrow - \frac{3}{4}.\frac{{{6^2}}}{x} = {\left( {\frac{3}{2}} \right)^3}.8\\
\Leftrightarrow - \frac{3}{4}.\frac{{36}}{x} = \frac{{27}}{8}.8\\
\Leftrightarrow - 3.\frac{9}{x} = 27\\
\Leftrightarrow - \frac{{27}}{x} = 27\\
\Leftrightarrow - 27 = 27x\\
\Leftrightarrow x = - 1\left( {Thoa\_man} \right)
$
