\(a-68=\left(3\frac{10}{11}-4\right):\left(\frac{2121}{2222}-1\right):\left(\frac{33333}{343434}-1\right)\)

\(a-68=\left(\frac{43}{11}-4\right):\left(\frac{-1}{22}\right):\left(\frac{-310101}{343434}\right)\)

\(a-68=\frac{-1}{11}.\frac{-22}{1}.\frac{-343434}{310101}\)
\(a-68=\frac{1}{11}.\frac{22}{1}.\frac{343434}{310101}.\left(-1\right)\)

\(a-68=\frac{-686868}{310101}\)

          \(a=\frac{-686868}{310101}+68\)

          \(a=\frac{-20400000}{310101}\)

Vậy  \(a=\frac{-20400000}{310101}\)

cảm ơn bạn Lam Ngo Tung

\(x+7\dfrac{4}{5}=9\dfrac{7}{15}\)

\(=>x+\dfrac{39}{5}=\dfrac{142}{15}\)

\(=>x=\dfrac{142}{15}-\dfrac{39}{5}=\dfrac{142}{15}-\dfrac{117}{15}\)

\(=>x=\dfrac{25}{15}=\dfrac{5}{3}\)

___________

\(x-4\dfrac{9}{11}=\dfrac{2121}{2222}\)

\(=>x-\dfrac{53}{11}=\dfrac{21}{22}\)

\(=>x=\dfrac{21}{22}+\dfrac{53}{11}=\dfrac{21}{22}+\dfrac{106}{22}\)

\(=>x=\dfrac{127}{22}\)

\(x+7\dfrac{4}{5}=9\dfrac{7}{15}\)

\(x=9\dfrac{7}{15}-7\dfrac{4}{5}\)

\(x=\left(9-7\right)+\left(\dfrac{7}{15}-\dfrac{4}{5}\right)\)

\(x=2\dfrac{-1}{3}=\dfrac{5}{3}\)

\(x=\dfrac{2121:101}{2222:101}+4\dfrac{9}{11}\)

\(x=\dfrac{21}{22}+4\dfrac{18}{22}\)

\(x=\dfrac{21+4\cdot22+18}{22}=\dfrac{127}{22}\)

a ) \(x+7\frac{4}{5}=9\frac{7}{15}\)

\(x+\frac{39}{5}=\frac{142}{15}\)

\(x=\frac{142}{15}-\frac{39}{5}\)

\(x=\frac{5}{3}\)

b ) \(x-4\frac{9}{11}=\frac{2121}{2222}\)

\(x-\frac{53}{11}=\frac{21}{22}\)

\(x=\frac{21}{22}+\frac{53}{11}\)

\(x=\frac{127}{22}\)

ai đúng trả lời trước mik sẽ kick cho ^^

câu a kêt quả bằng 

x+ 117/15=142/15

x=142/15+117/15

x=25/15=3/5

kết quả câu b bằng 

x-10706/2222=2121/2222

x=2121/2222+10706/2222

x=12824/2222

mình tra rloiw fsong rùi bn k nhé

\(x+7\frac{4}{5}=9\frac{7}{15}\)

\(x=9\frac{7}{15}-7\frac{4}{5}\)

\(x=9\frac{7}{15}-7\frac{12}{15}\)

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

\(x-4\frac{9}{11}=\frac{2121}{2222}\)

\(x-4\frac{9}{11}=\frac{101.21}{101.22}\)

\(x-\frac{53}{11}=\frac{21}{22}\)

\(x=\frac{21}{22}+\frac{53}{11}\)

\(x=\frac{127}{22}=5\frac{17}{22}\)

a) x + \(7\frac{4}{5}\)= \(9\frac{7}{15}\)

x + 39/5 = 95/15

x = 95/15 - 39/5 

x = 95/15 - 127/15

x = -32/15

b) Tương tự

điểm âm của mik chỉ còn 158 nữa thôi, các bn giúp mik nha

Khi nào hết âm mik sẽ ra câu hỏi và giúp lại các bn

Cảm ơn trc~ 

So sánh: \(\dfrac{323232}{333333}\)và \(\dfrac{333333}{343434}\)

\(\Rightarrow\) Ta cần phải so sánh \(323232.343434\) và \(333333.333333\)

Mà: \(323232.343434>333333^2\)

\(\Rightarrow\dfrac{323232}{333333}>\dfrac{333333}{343434}\)