0                                      

a)\(\Leftrightarrow\)\(x=\dfrac{2323}{4646}-\dfrac{1313}{2828}\)

\(\Leftrightarrow\)\(x=\dfrac{1}{28}\)

b)\(\Leftrightarrow\)\(x=\dfrac{23}{69}-\dfrac{17}{153}\)

\(\Leftrightarrow\)\(x=\dfrac{2}{9}\)

a) \(\dfrac{1313}{2828}\) + \(x\) = \(\dfrac{2323}{4646}\)

\(\dfrac{13}{28}\) + \(x\) = \(\dfrac{1}{2}\)

\(x=\dfrac{1}{2}-\dfrac{13}{28}\)

\(x=\dfrac{14}{28}-\dfrac{13}{28}\)

\(x=\dfrac{1}{28}\)

b) \(\dfrac{23}{69}-x=\dfrac{17}{153}\)

\(\dfrac{1}{3}-x=\dfrac{1}{9}\)

\(x=\dfrac{1}{9}+\dfrac{1}{3}\)

\(x=\dfrac{1}{9}+\dfrac{3}{9}\)

\(x=\dfrac{4}{9}\)

a)\(\left(\dfrac{1}{9}:\dfrac{8}{27}\right):\left(\dfrac{16}{48}:\dfrac{8}{21}\right)\)

=\(\dfrac{3}{8}:\dfrac{7}{8}\)

=\(\dfrac{3}{7}\)

b)\(\dfrac{19}{23}+\dfrac{1}{9}\cdot\dfrac{36}{23}\)

=\(\dfrac{19}{23}+\left(\dfrac{1}{9}\cdot\dfrac{36}{23}\right)\)

=\(\dfrac{19}{23}+\left(\dfrac{1}{1}\cdot\dfrac{4}{23}\right)\)

=\(\dfrac{19}{23}+\dfrac{4}{23}\)

=\(\dfrac{23}{23}=1\)

c)\(\left(\dfrac{13}{23}+\dfrac{1313}{2323}-\dfrac{131313}{232323}\right)\cdot\left(\dfrac{1}{3}+\dfrac{1}{4}-\dfrac{7}{12}\right)\)

=\(\left(\dfrac{13}{23}+\dfrac{1313}{2323}-\dfrac{131313}{232323}\right)\cdot\left(\dfrac{4}{12}+\dfrac{3}{12}-\dfrac{7}{12}\right)\)

=\(\left(\dfrac{13}{23}+\dfrac{1313}{2323}-\dfrac{131313}{232323}\right)\cdot0\)

=0

chúc bn học tốt!

\(\frac{1313}{2828}+x=\frac{2323}{4646}\)

hay \(\frac{13}{28}+x=\frac{1}{2}\)

\(x=\frac{1}{2}-\frac{13}{28}\)

\(x=\frac{1}{28}\)

\(\frac{23}{69}-x=\frac{17}{153}\)

hay \(\frac{1}{3}-x=\frac{1}{9}\)

\(x=\frac{1}{3}-\frac{1}{9}\)

\(x=\frac{2}{9}\)

\(a,\frac{1313}{2828}+x=\frac{2323}{4646}\)

\(\frac{13}{28}+x=\frac{1}{2}\)

\(x=\frac{1}{2}-\frac{13}{28}=\frac{1}{28}\)

\(b,\frac{5}{7}+\frac{x}{35}=\frac{4}{5}\)

\(\frac{x}{35}=\frac{4}{5}-\frac{5}{7}=\frac{3}{35}\)

\(\Rightarrow x=3\)

\(c,\frac{23}{69}-x=\frac{17}{153}\)

\(\frac{1}{3}-x=\frac{1}{9}\)

\(x=\frac{1}{3}-\frac{1}{9}=\frac{2}{9}\)

\(a,\frac{1313}{2828}+x=\frac{2323}{4646}\)

\(\frac{13}{28}+x=\frac{1}{2}\)

\(x=\frac{1}{2}-\frac{13}{28}=\frac{1}{28}\)

\(b,\frac{5}{7}+\frac{x}{35}=\frac{4}{5}\)

\(\frac{x}{35}=\frac{4}{5}-\frac{5}{7}=\frac{3}{35}\)

\(\Rightarrow x=3\)

\(c,\frac{23}{69}-x=\frac{17}{153}\)

\(x=\frac{23}{69}-\frac{17}{153}=\frac{2}{9}\)

a: =-11/23(6/7+8/7)-1/23

=-22/23-1/23

=-1

b: =21/23-21/23+125/143-125/143

=0

cái đầu giữ nguyên các cái sau chia cả tử và mẫu lần lượt cho 1010101,101,10101 là ra các phân số bằng nhau

2323/5656 = 23/56

232323/565656 = 23/56

Vậy 3 p/s bằng nhau

thanks

bạn làm rõ hơn cho mình nhé!

Tra loi :

\(\frac{2323}{1515}-\frac{23}{15}=0\)

Ung ho nha

hok tot

Rút gọn: \(\frac{2323}{1515}=\frac{2323:101}{1515:101}=\frac{23}{15}\)

Ta có: \(\frac{23}{15}-\frac{23}{15}=0\)

Vậy \(\frac{2323}{1515}-\frac{23}{15}=0\)