解方程：（56+58）x=7204（1-25%）x=3646×9-12x=26.8x+20%x=40．

Question

解方程： （(5)/(6)+(5)/(8)）x=(7)/(20)	4（1-25%）x=36
46×9-(1)/(2)x=26.8	x+20% x=40．

Answer 1

（1）（(5)/(6)+(5)/(8)）x=(7)/(20)
              (35)/(24)x=(7)/(20)
          (35)/(24)x÷(35)/(24)=(7)/(20)÷(35)/(24)
                 x=(6)/(25)；

（2）4（1-25%）x=36
             3x=36
          3x÷3=36÷3
              x=12；

（3）46×9-(1)/(2)x=26.8
       414-(1)/(2)x=26.8
   414-(1)/(2)x+(1)/(2)x=26.8+(1)/(2)x
      (1)/(2)x+26.8=414
 (1)/(2)x+26.8-26.8=414-26.8
           (1)/(2)x=387.2
        (1)/(2)x÷(1)/(2)=387.2÷(1)/(2)
             x=774.4；

（4）x+20%x=40
       1.2x=40
  1.2x÷1.2=40÷1.2
          x=33(1)/(3)．