2x-30%x=1.9+÷ 4x-3(20-x)=3
× =
5÷0.4=
0÷12=
1- =
12×2.5×4=
÷ =
0.89÷100=
2.8×0.1=
=
3.4÷8÷12.5=
12x+7×0.3=26.1 :x=: 65%x-x=4