Tìm x, biết: a) 3 1/5 x - 4 2/3 = 3 1/3 b) 2 2/3 x + 3 3/4 x = 385/24

a) 315x−423=313⇒315x=313+423=8 ⇒x=8:165=8.516=52

b) 223x+334x=38524⇒x223+334=3854⇒x.7712=3854⇒x=3854:7712=15