Tìm x biết: x + 1/55 + x + 3/53 + x + 5/51 = x + 7/49 + x + 9/47 + x + 11/45

tìm x, bt
a)x+1/55+x+3/53+x+5/51=x+7/49+x+9/47+x+11/45
b)x+29/31-x+27/33=x+17/43-x+15/45
Mg ơi, giúp bé vs đc ko ạ