Đáp án:
3) x=-1
Giải thích các bước giải:
\(\begin{array}{l}
1)\left( {\dfrac{7}{2} + 2x} \right).\dfrac{8}{3} = \dfrac{{16}}{3}\\
\to \dfrac{7}{2} + 2x = 2\\
\to 2x = - \dfrac{3}{2}\\
\to x = - \dfrac{3}{4}\\
2)\dfrac{2}{3}x - \dfrac{1}{2}x = \dfrac{5}{2}\\
\to \dfrac{1}{6}x = \dfrac{5}{2}\\
\to x = 15\\
3)x = - \dfrac{{11}}{{23}}\left( {\dfrac{{6 + 8}}{7}} \right) - \dfrac{1}{{23}}\\
\to x = - \dfrac{{11}}{{23}}.2 - \dfrac{1}{{23}} = \dfrac{{ - 22 - 1}}{{23}}\\
\to x = - 1\\
4)\left( { - \dfrac{5}{{24}} + \dfrac{3}{4} + \dfrac{7}{{12}}} \right):\left( { - \dfrac{{17}}{8}} \right)\\
= \dfrac{9}{8}:\left( { - \dfrac{{17}}{8}} \right) = - \dfrac{9}{{17}}\\
5)x - \dfrac{1}{4} = \dfrac{5}{8} - \dfrac{2}{3}\\
\to x - \dfrac{1}{4} = - \dfrac{1}{{24}}\\
\to x = \dfrac{5}{{24}}
\end{array}\)
