\(x:\dfrac{4}{7}=\dfrac{6}{7}-\dfrac{1}{3}\\ \Rightarrow x:\dfrac{4}{7}=\dfrac{18}{21}-\dfrac{7}{21}\\ \Rightarrow x:\dfrac{4}{7}=\dfrac{11}{21}\\ \Rightarrow x=\dfrac{11}{21}\times\dfrac{4}{7}\\ \Rightarrow x=\dfrac{44}{147}\)

\(x\div\dfrac{4}{7}=\dfrac{6}{7}-\dfrac{1}{3}\)

\(x\div\dfrac{4}{7}=\dfrac{11}{21}\)

\(x=\dfrac{11}{21}\times\dfrac{4}{7}\)

\(x=\dfrac{44}{147}\)

=>x:4/7=18/21-7/21=11/21

hay x=44/147

773 nha

773 bn nhé

1+2+4+765+1= 773

chúc bạn ngày càng học giỏi

\(x-\dfrac{3}{5}=\dfrac{2}{3}\times\dfrac{1}{5}\\ \Rightarrow x-\dfrac{3}{5}=\dfrac{2}{15}\\ \Rightarrow x=\dfrac{2}{15}+\dfrac{3}{5}\\ \Rightarrow x=\dfrac{2}{15}+\dfrac{9}{15}\\ \Rightarrow x=\dfrac{11}{15}\)

=>x-3/5=2/15

hay x=11/15

x-3/5=2/3 x1/5

x-3/5=2/15

x=2/15+3/5

x=2/15+9/15

x=11/15

Gọi số đó là abcde.

\(7abcde=4.abcde7\)

\(700000+abcde=4.\left(abcde.10+7\right)\)

\(700000+abcde=40.abcde+28\)

\(699972=39.abcde\)

\(\Rightarrow abcde=699972:39=17948\)

\(9:\dfrac{3}{5}=9\times\dfrac{5}{3}=15\)

\(9:\dfrac{3}{5}=\dfrac{9}{1}\times\dfrac{5}{3}=\dfrac{45}{3}=\dfrac{15}{1}\)

15

HT

dftgxdfgd

MINH KO DOC DUOC ??

đọc đc j

Để \(x\left(2+x^2\right)\left(7-x\right)=0\hept{\begin{cases}x=0\\2+x^2=0\\7-x=0\end{cases}}\)

Mà \(2+x^2>0\) => \(\orbr{\begin{cases}x=0\\7-x=0\end{cases}}\)=> \(\orbr{\begin{cases}x=0\\x=7\end{cases}}\)

Vậy x = { 0; 7 }

bn có chắc ko,dù sao cũng cảm ơn bn

ba+n = bố+n(vì ba=bố)=bốn

=>ba+n=bốn

bằng bốn bạn hãy giải thích đi

ba + n = n + ba