求未知数x．2x-53x=37；9.23-12x=3.23；x9=14：16．

Question

求未知数x．
2x-(5)/(3)x=(3)/(7)；            9.23-12x=3.23；             (x)/(9)=(1)/(4)：(1)/(6)．

Answer 1

①2x-(5)/(3)x=(3)/(7)   
         (1)/(3)x=(3)/(7)
      (1)/(3)x×3=(3)/(7)×3
           x=(9)/(7)

        
    ②9.23-12x=3.23    
  9.23+12x-12x=3.23+12x
      3.23+12x=9.23
 3.23-3.23+12x=9.23-3.23
           12x=6
       12x÷12=6÷12
             x=0.5

 ③(x)/(9)=(1)/(4)：(1)/(6)
  x：9=(1)/(4)：(1)/(6)
   (1)/(6)x=(1)/(4)×9
(1)/(6)x×6=(1)/(4)×9×6
     x=13.5