Bài 1 : Tính
C = (\(\frac{2}{3}\)- \(\frac{1}{4}\)+ \(\frac{5}{11}\)) \(\div\)( \(\frac{5}{12}\)+ 1 - \(\frac{7}{11}\))
F = 12\(\frac{1}{3}\)- \(\frac{5}{7}\)\(\div\)( 24 - 23\(\frac{5}{7}\))
Bài 2 : Tìm x biết
\(\frac{1}{4}\)+ \(\frac{1}{3}\)\(\div\)3x = -5
( \(\frac{3}{5}\)x - 0,75 ) \(\div\)\(\frac{3}{7}\)= 2\(\frac{4}{5}\)
2\(\frac{1}{4}\)\(\div\)( x - 7\(\frac{1}{3}\)) = -1,5