Bài 1. Tìm x, biết:
a) \(\left(x-\dfrac{3}{5}\right).\left(\dfrac{18}{5}-\dfrac{4}{5}x\right)=0\)
b) \(5x.\left(x-\dfrac{1}{3}\right)=0\)
c) \(\left(x+\dfrac{1}{4}\right).\left(x-\dfrac{3}{7}\right)=0\)
d) \(\left(x+\dfrac{5}{3}\right).\left(x-\dfrac{5}{4}\right)=0\)
e) \(\left(\dfrac{3}{4}x-\dfrac{9}{16}\right).\left(1,5+\dfrac{-3}{5}:x\right)=0\)
f) \(\left(2,4-3x\right).0,5=0\)
g) \(\left(\dfrac{2x}{3}-3\right).\left(-10+2x\right)=0\)
h) \(\left(x-\dfrac{3}{14}\right).\left(5x+\dfrac{5}{12}\right)=0\\ \)
i) \(\left(x:\dfrac{1}{3}-3\right).\left(x-\dfrac{2}{5}\right)=0\)
j) \(\left(\dfrac{-2}{15}-x\right).\left(3x-\dfrac{1}{4}\right)=0\)

1. Tìm x, biết
a) \(x:\dfrac{16}{7}+\dfrac{1}{8}=\dfrac{4}{3}\)
b)\(\dfrac{1}{3}+x:\dfrac{1}{3}=1\)

1. Thực hiện phép tinh một cách hợp lý:
a) A = \(\dfrac{4}{3}-\dfrac{22}{35}+\dfrac{23}{3}-\dfrac{13}{35}-2\)
b) B = \(1\dfrac{5}{3}.\dfrac{2}{7}+\dfrac{8}{3}.\dfrac{5}{7}-\dfrac{2}{3}\)
c) C = \(\dfrac{515}{2019}.\dfrac{-2017}{2018}+\dfrac{515}{2019}.\dfrac{-1}{2018}\)
d) D = \(5\dfrac{2}{3}:\left(\dfrac{-2}{7}\right)-7\dfrac{2}{3}:\dfrac{2}{7}\)
e) E = \(\dfrac{15}{34}+\dfrac{15}{17}+\dfrac{19}{34}-1\dfrac{15}{17}+\dfrac{2}{3}\)
f)  F = \(5\dfrac{6}{7}.\left(\dfrac{-5}{6}+\dfrac{6}{7}\right)+\dfrac{41}{7}.\left(-\dfrac{1}{6}+\dfrac{1}{7}\right)\)
g) G = \(\dfrac{1}{3}-\dfrac{1}{7}+\dfrac{3}{2}+\dfrac{17}{3}-\dfrac{27}{7}\)
h) H = \(7\dfrac{1}{3}.2\dfrac{1}{11}-7\dfrac{1}{3}.1\dfrac{9}{11}-\dfrac{3}{2}\)