47立方分米=(47)立方分米
4.6x=9.2
4.6x÷4.6=9.2÷4.6
x=2
3.85+1.5x=6.1
3.85+1.5x-3.85=6.1-3.85
x=2.25÷1.5
x=1.5
6x-0.9=4.5
6x-0.9+0.9=4.5+0.9
x=5.4÷6
x=0.9
3x+x=2
4x÷4=2÷4
x=0.5
5x+2=42
5x+2-2=42-2
x=40÷5
x=8
3.6x-x=7.8
7.8-3.6=2x
x=4.2÷2
x=2.1
2(x-1)=2.4
2(x-1)÷2=2.4÷2
x=1.2+1
x=2.2