Tìm x :
a) \(\frac{3}{7}\)+ x = \(\frac{-2}{7}\)
b) \(\frac{3}{2}\)+ x =\(\frac{3}{2}\)- 7
c) \(\frac{4}{14}\)+ x = \(\frac{10}{-21}\)
d) \(\frac{4}{14}\)- x = \(\frac{10}{-21}\)
e) x - \(\frac{5}{-14}\)= \(\frac{12}{-21}\)
f) / x + \(\frac{1}{2}\)/ = \(\frac{1}{6}\)