cho mình hỏi "va"là gì zợ

hổng hiểu gì hết

tui cũng vậy

đề gi rõ ra mới tính được

\(\frac{2}{3}\cdot x:\frac{1}{5}=1\frac{1}{3}:\frac{1}{4}\)

\(\Leftrightarrow\frac{2}{3}\cdot x:\frac{1}{5}=\frac{16}{3}\)

\(\Rightarrow\frac{2}{3}\cdot x=\frac{16}{3}\cdot\frac{1}{5}\)

\(\Rightarrow x=\frac{16}{15}:\frac{2}{3}\)

\(\Rightarrow x=\frac{8}{5}\)

Ta có :

\(\frac{2}{3}x:\frac{1}{5}=1\frac{1}{3}:\frac{1}{4}\)

\(\frac{2}{3}x:\frac{1}{5}=\frac{1}{3}:\frac{1}{4}\)

\(2x:\frac{1}{5}=\frac{4}{3}\)

\(2x=\frac{4}{3}.\frac{1}{5}\)

\(2x=\frac{4}{15}\)

\(x=\frac{4}{15}:2\)

\(\Rightarrow x=\frac{2}{15}\)

dấu nhân là x đấy nha

nhớ k đúng mik nha!^_^

minh khong hieu ban giai thich cho minh di

do la dau nhan ma ban 

= \(\frac{4}{3}\)+ \(\frac{6}{5}\)x y - \(\frac{4}{5}\)= \(\frac{14}{5}\)

= \(\frac{8}{15}\)+ \(\frac{6}{5}\)x y = \(\frac{14}{5}\)

\(\frac{6}{5}\)x y = \(\frac{14}{5}\)- \(\frac{8}{15}\)= \(\frac{6}{15}\)

y = \(\frac{6}{15}\): \(\frac{6}{5}\)

y = \(\frac{1}{3}\)

X=6/5x7/6x8/7x...x2015/2014

X=6x7x8x...x2015/5x6x7x...x2014

X=2015/5=403

K nhé các bạn ơi.

403 nhe cac ban

Ta có \(\frac{2}{9}+2\frac{4}{9}\times\frac{1}{2}-3:1\frac{1}{2}\)

\(=\frac{2}{9}+\frac{22}{9}\times\frac{1}{2}-3:\frac{3}{2}\)

\(=\frac{2}{9}+\frac{11}{9}-\frac{6}{3}\)

\(=\frac{13}{9}-\frac{18}{9}\)

\(=\frac{13-18}{9}\)

\(=-\frac{5}{9}\)

Vậy \(x=-\frac{5}{9}\)