Giải phương trình
a, \(\dfrac{x+98}{2}\)+\(\dfrac{x+96}{4}\) = \(\dfrac{x+3}{97}\)+\(\dfrac{x+5}{95}\)
b, \(\dfrac{x-91}{37}\)+\(\dfrac{x+86}{42}\) = \(\dfrac{x-78}{50}\)+\(\dfrac{x-49}{79}\)
c,\(\dfrac{a+b+x}{c}\)+\(\dfrac{b+c-x}{a}\)+\(\dfrac{c+a-x}{b}\)+\(\dfrac{4x}{a+b+c}\) = 1
GIÚP MIK VS