3.2x﹣4×3=52 x:1.2=3:4 2x+3×0.9=24.7
7x+3×16=69 8:x=4:0.8
5.4+2x=8.6 4.2×(x﹣5)=63 16:x=0.75:
1.4x+9.2x=53 :x=3:12
0.4x+3.5=6.3
x:4=16:5
12﹣5x=6.5
22.5:4=x:5
7.2:x=
解:3.6x=57.6
3.6x÷3.6=57.6÷3.6
x=16
① ②
①1.5x-2.8=4.7
②
③12: =
①
③ =3:2