A. \[\frac{2}{5}\]
B. \[\frac{{338}}{{125}}\]
C. \[\frac{5}{2}\]
D. \[\frac{{125}}{{338}}\]
Giải bởi Vietjack
\[\begin{array}{*{20}{l}}{\frac{{13}}{{25}}:x = \frac{5}{{26}}}\\{x = \frac{{13}}{{25}}:\frac{5}{{26}}}\\{x = \frac{{13}}{{25}}.\frac{{26}}{5}}\\{x = \frac{{338}}{{125}}}\end{array}\]
Đáp án cần chọn là: B
\[\left( {\frac{{20}}{7}.\frac{{ - 4}}{{ - 5}}} \right) + \left( {\frac{{20}}{7}.\frac{3}{{ - 5}}} \right)\]
