7(2x-1)-3(4x-1)=4(3x+2)-1; (5y+1)+ (1-y)= (9y+1)+ (1-3y); 20%+(1-20%)(320-x)=320×40% 2(x-2)+2=x+1 2(x-2)-3(4x-1)=9(1-x) x/3 -5 = (5-x)/2 2(x+1) /3=5(x+1) /6 -1 (1/5)x +1 =(2x+1)/4 (5-2)/2 - (4+x)/3 =...有是分数的吗？

1. 1.  20%+(1-20%)(320-x)=320×40%
   
   2.  3/2[2/3(1/4x-1)-2]-x=2
   
   3.  ax+b=bx+a;(a≠b);（这个学了么？是不是有点难呢？）
   
   4.  1/5x +1 =(2x+1)/4
   
   5.  x/3 -5 = (5-x)/2
   
   6.  0.4(x-0.2)+1.5=0.7x-0.38  
   
   7.  28.2(x+1) /3=5(x+1) /6 -1
   
   8.  (5-2)/2 - (4+x)/3 =1
   
   9.  (x-2)/2 - (3x-2)/4 =-1
   
   10.  1\ 50x+10=60