(1)x- 2 7 x= 3 4 , 5 7 x= 3 4 , 5 7 x÷ 5 7 = 3 4 ÷ 5 7 , x= 21 20 ;(2)x:12=36, x÷12=36, x÷12×12=36×12, x=432.