Question

[Lã Chính Nhân]

tìm x biết : a) \(\frac{7}{11}\) < x -\(\frac{1}{7}\)< \(\frac{10}{13}\)               

                  b) \(\frac{7}{9}\) < \(\frac{13}{11}\) - x <  \(\frac{15}{16}\)          

Answer 1

[Hằng Nguyễn Thúy]

a)\(\frac{7}{11}< x-\frac{1}{7}< \frac{10}{3}\)

\(=>\frac{7}{11}+\frac{1}{7}< x< \frac{10}{3}+\frac{1}{7}\)

\(=>\frac{60}{77}< x< \frac{73}{21}\)

VẬY \(\frac{60}{77}< x< \frac{73}{21}\)

b) \(\frac{40}{99}>x>\frac{43}{176}\)