解方程．34x÷16=243x-12.8×3=0.06310ⅹ-21×23=7．

Question

解方程．
(3)/(4)x÷(1)/(6)=24             
3x-12.8×3=0.06          
(3)/(10)ⅹ-21×(2)/(3)=7．

Answer 1

①(3)/(4)x÷(1)/(6)=24
  (3)/(4)x÷(1)/(6)×(1)/(6)=24×(1)/(6)
        (3)/(4)x=4
     (3)/(4)x÷(3)/(4)=4÷(3)/(4)
         x=(16)/(3)
             
②3x-12.8×3=0.06       
     3x-38.4=0.06   
3x-38.4+38.4=0.06+38.4 
          3x=38.46
       3x÷3=38.46÷3
           x=12.82

③(3)/(10)ⅹ-21×(2)/(3)=7
      (3)/(10)x-14=7
   (3)/(10)x-14+14=7+14
     (3)/(10)x÷(3)/(10)=21÷(3)/(10)
           x=70