Question

Answer 1

\(\dfrac{4}{7}-x=\dfrac{1}{3}-\left(-\dfrac{2}{5}\right)\)

\(\Leftrightarrow x=\dfrac{4}{7}-\dfrac{1}{3}+\left(-\dfrac{2}{5}\right)\)

\(\Leftrightarrow x=-\dfrac{17}{105}\)

Answer 2

\(c,\Rightarrow\dfrac{4}{7}-x=\dfrac{11}{15}\Rightarrow x=\dfrac{4}{7}-\dfrac{11}{15}=-\dfrac{17}{105}\)

Answer 3

khoan dừng khoảng chừng là 2s

để nó biết ông chủ chính là ai đây

\(c.\dfrac{4}{7}-x=\dfrac{1}{3}-\left(-\dfrac{2}{5}\right)\\ \Leftrightarrow\dfrac{4}{7}-x=\dfrac{11}{15}\\\Leftrightarrow x=\dfrac{4}{7}-\dfrac{11}{15}\\ \Leftrightarrow x=-\dfrac{17}{105} \)