Câu trả lời:
\(\left(-\frac{5}{4}x+2,17\right)\left[\frac{2}{\frac{3}{7}}-\left(-\frac{1}{2}x\right)\right]=0\)
\(\Rightarrow\hept{\begin{cases}-\frac{5}{4}x+2,17=0\\\frac{2}{\frac{3}{7}}-\left(-\frac{1}{2}x\right)=0\end{cases}\Rightarrow\hept{\begin{cases}-\frac{5}{4}x=-2,17\\\frac{1}{2}x=\frac{14}{3}\end{cases}}}\Rightarrow\hept{\begin{cases}x=\frac{217}{125}\\x=\frac{28}{3}\end{cases}}\)
Vậy x= 217/125 hoặc x= 28/3