Tìm x, biết:
a) \(\frac{x+1}{5}\)+ \(\frac{x+3}{4}\)= \(\frac{x+5}{3}\)+ \(\frac{x+7}{2}\)
b) \(\frac{3}{\left(x+2\right)\left(x+5\right)}\)+ \(\frac{5}{\left(x+5\right)\left(x+10\right)}\)+ \(\frac{7}{\left(x+10\right)\left(x+17\right)}\)= \(\frac{x}{\left(x+2\right)\left(x+17\right)}\)
Giúp mk với nha!!!