Bài làm
x = \(\frac{20}{21}+\frac{21}{22}+\frac{22}{23}+\frac{23}{20}\)
x = 1 + 1 + 1 + 1 + \((\)\(\frac{3}{20}-\frac{1}{21}-\frac{1}{22}-\frac{1}{23})\)
Ta thấy 0 < \(\frac{3}{20}-\frac{1}{21}-\frac{1}{22}-\frac{1}{23}\)
\(\Rightarrow\) 1 + 1 + 1 + 1 + \((\frac{3}{20}-\frac{1}{21}-\frac{1}{22}-\frac{1}{23})\)> 4
\(\Rightarrow\)x > 4
Bài 1 :
\(\frac{x+4}{20}+\frac{x+3}{21}+\frac{x+2}{22}\)\(=\frac{x+1}{23}=-4\)
Tìm x biết :
a) \(\frac{x+11}{10}+\frac{x+21}{20}+\frac{x+31}{30}=\frac{x+41}{40}+\frac{x+101}{50}\)
b) \(\frac{x+2}{42}+\frac{x+4}{22}=\frac{x+5}{23}+\frac{x+3}{43}\)
c) \(\frac{x-10}{20}+\frac{x-20}{10}+\frac{x-30}{5}=\frac{x-14}{4}\)
Tìm x biết:
\(\frac{x}{20}\)+ \(\frac{x-1}{21}\)= \(\frac{x-2}{22}\)+\(\frac{x-3}{23}\)
câu 1 : \(\frac{x+2}{42}+\frac{x+4}{22}=\frac{x+5}{23}+\frac{x+3}{43}\)
câu 2 : \(\frac{x-10}{20}+\frac{x-20}{10}+\frac{x-30}{5}=\frac{x-14}{4}\)
câu 1 : \(\frac{x+2}{42}+\frac{x+4}{22}=\frac{x+5}{23}+\frac{x+3}{43}\)
câu 2 : \(\frac{x-10}{20}+\frac{x-20}{10}+\frac{x-30}{5}=\frac{x-14}{4}\)
\(\frac{x-3}{21}+\frac{x-3}{22}+\frac{x-3}{23}+\frac{x-3}{24}+\frac{x-3}{25}\)
\(Thanks\)
thuc hien phep tinh
\(2\frac{1}{3}+\left(-0,25\right)+\frac{17}{22}-\frac{3}{4}+\frac{5}{22}\) \(\frac{4}{23}+\frac{5}{21}-\frac{4}{23}+\frac{1}{2}+\frac{16}{21}\)
Tìm x:
\(\frac{x+3}{20}+\frac{x-15}{21}+\frac{x-35}{22}=6\)
Giúp mình nha!
\(\frac{x-25}{1979}-\frac{x-24}{1980}-\frac{x-23}{1981}-\frac{x-22}{1982}=\frac{x-1979}{25}-\frac{x-1980}{24}-\frac{x-1981}{23}-\frac{x-1982}{22}\)
giúp tôi với nếu đúng cho 3 tick
