3.4x﹣7×1.3=9.9; :0.4=1.35:x.
5.34+x=30.6
7x=17.5
9×3﹣1.7x=13.4
2y+10=110
x+5x=36
x÷0.6=4.5
70÷2x=7
18﹣x=18.
x﹣75%x﹣10%x=30
x: =14:0.2.
5-3x=1.7
x=
120+ x=168 5×(2x+33)=195 =0.12:1