Tìm x :
a) [ (35\(\dfrac{5}{7}\) + 2\(\dfrac{3}{4}\) ) - \(5\dfrac{5}{7}\) + \(\dfrac{1}{4}\) ] : ( 11 + x ) = 3
b) ( 1 - \(\dfrac{1}{2}\) ) . ( 1 - \(\dfrac{1}{3}\) ) . ( 1 - \(\dfrac{1}{4}\) ) ... ( 1 - \(\dfrac{1}{10}\) ) = \(\dfrac{x}{2010}\)
Ai làm nhanh , đc em tick ạ
Ai làm giúp e vs ạ