x-75%x=1.5 x+x=72×(1+)
0.375×0.375= 1 ÷12.5%=
45÷75%= 0.3+2%= ÷=
﹣65%= 1.5×20%= 2÷0.1%=
10÷10%= 600×3%= 0.38×+0.62×0.25=
10.8-0.9= 75%-= ×0.28×7 ×0=
①x﹣ =0.25
② x﹣ =120
③ =50%
①1.5x-2.8=4.7
②
③12: =
②x: =4: .