3.2乘5-80%x=20.4(x-1\2)=2.4x+1\4=0.6乘150%2\5:x=16:101\3:1\6=1\2:xx:3\4=4\252\3:5\6=x:9

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3.2乘5-80%x=20.4(x-1\2)=2.4x+1\4=0.6乘150%2\5:x=16:101\3:1\6=1\2:xx:3\4=4\252\3:5\6=x:9

3.2乘5-80%x=20.4(x-1\2)=2.4x+1\4=0.6乘150%2\5:x=16:101\3:1\6=1\2:xx:3\4=4\252\3:5\6=x:9
3.2乘5-80%x=2
0.4(x-1\2)=2.4
x+1\4=0.6乘150%
2\5:x=16:10
1\3:1\6=1\2:x
x:3\4=4\25
2\3:5\6=x:9

3.2乘5-80%x=20.4(x-1\2)=2.4x+1\4=0.6乘150%2\5:x=16:101\3:1\6=1\2:xx:3\4=4\252\3:5\6=x:9
3.2×5-80℅x=2
16-80℅x=2
80℅x=16-2
80℅x=14
x=14÷80℅
x=17.5
0.4(x-1/2)=2.4
x-1/2=2.4÷0.4
x-1/2=6
x=6+1/2
x=6.5
x+1/4=0.6×150℅
x+1/4=0.9
x=0.9-1/4
x=0.65
2/5:x=16:10
16x=10×2/5
16x=4
x=1/4
1/3:1/6=1/2:x
1/3x=1/6×1/2
1/3x=1/12
x=1/12÷1/3
x=1/4
x:3/4=4/25
x=3/4×4/25
x=3/25
2/3:5/6=x:9
5/6x=9×2/3
5/6x=6
x=6÷5/6
x=7.2

3.2X5-80%x=2
16-80%x =2
80%x =16-2
x=14÷80%
x=17.5

1. 16-0.8x=2 0.8x=14 x=17.5
2. 0.4乘以(x-0.5)=2.4 x=6.5
3. x+0.25=0.6乘以1.5 x=0.65
4. 0.4/x=1.6 x=0.25
5.2=0.5x x=4
6.100x=12 x=0.12
7.4/5=x/9 x=7.2