班级          姓名           成绩
X－ 27 X=    2X + 25 =  35   70%X + 20%X = 3.6
X× =20×     25% + 10X =         X - 15%X = 68
X＋ X＝121       5X－3× ＝        X÷ ＝12
6X＋5 =13.4                    3X= 
X÷ =          X＋ X=           4X－6× =2
 125 ÷X=310           X =        X =  ×  
    
     
X÷  = ×       4x－3 ×9 = 29   x +  x = 4
 X－21× =4                     
6X＋5 =13.4       25 X-13 X=310       4χ－6＝38
5X=               X=                X÷ = 

 X÷ =12           X=             X= × 
X÷ = ÷          X-0.25=           =30% 
4+0.7X=102        X+ X=42         X+ X=105
 X- X=400            X-0.125X=8         =  
X+37 X=18        X×( 16 + 38 )=1312         x－0.375x=  
x× + =4×       X－ X＝12　　 　　5 X－2.4×5＝8
0.36×5- 34 x = 35     23 (x- 4.5) = 7   12 x- 25%x = 10
x- 0.8x = 16+6     20 x– 8.5= 1.5     x- 45 x -4= 21  
X＋25%X=90               X－37 X= 89