1:5*6+4x=46 2: 8x-18+4=8 3: 6X+5*7=77 4: 1.2X+0.16/0.2=3.2
解 30+4x=46 解:8x-22=8 解:6X+35=77 解:1.2X+0.8=3.2
4x=16 8X=30 6X=42 1.2x=2.4
x=4 X=3.75 X=7 X=2
5*6+4x=46
解30+4x=46
4x=16
x=4
8x-18+4=8
解8x=22
x=2.75
6x+5*7=77
解6x+35=77
x=7
1.2x+0.16/0.2=3.2
解:1.2x+0.8=3.2
x=2