tách ra bn ơi

số hộp dâu tây của cả 3 bạn là

\(\left(1+1.\dfrac{1}{2}\right)+\left(1+1.\dfrac{3}{4}\right)+\left(1+1.\dfrac{3}{4}\right)=5\) (hộp)

mỗi bạn dược số hộp là

\(5:3=\dfrac{5}{3}\) (hộp)

đps:a) 5 hộp , b) \(\dfrac{5}{3}\) hộp

. là dấu nhân nhé

\(\dfrac{4}{7}\cdot\dfrac{5}{6}+\dfrac{4}{7}\cdot\dfrac{1}{6}\)

\(=\dfrac{10}{21}+\dfrac{2}{21}\)

\(=\dfrac{4}{7}\)

\(\dfrac{5}{7}+\dfrac{y}{35}=\dfrac{4}{5}\)

\(\dfrac{y}{35}=\dfrac{4}{5}-\dfrac{5}{7}\)

\(\dfrac{y}{35}=\dfrac{3}{35}\)

\(=>y=3\)

sai kìa chị ơi phải \(\dfrac{4}{9}\cdot\dfrac{5}{6}:\dfrac{25}{12}\) chứ

\(\left(5x-1\right)\cdot\left(2x-\dfrac{1}{3}\right)=0\)

\(< =>\left\{{}\begin{matrix}\left(5x-1\right)=0\\\left(2x-\dfrac{1}{3}\right)=0\end{matrix}\right.\)

\(< =>\left\{{}\begin{matrix}x=\dfrac{1}{5}\\x=\dfrac{1}{6}\end{matrix}\right.\)

\(\left(-1\dfrac{2}{3}\right):\left(1\dfrac{1}{9}\right)+\dfrac{5}{9}\cdot\left(-2\dfrac{7}{10}\right):\left|2\dfrac{4}{7}\right|-\dfrac{2}{5}\cdot\left(\dfrac{5}{6}-\dfrac{1}{3}\right)\)

\(=-\dfrac{5}{3}:\dfrac{10}{9}+\dfrac{5}{9}\cdot\left(-\dfrac{27}{10}\right):\left(-\dfrac{18}{7}\right)-\dfrac{2}{5}\cdot\dfrac{1}{2}\)

\(=-\dfrac{3}{2}+\dfrac{7}{12}-\dfrac{1}{5}=-\dfrac{67}{60}\)