3×1.8-0.6X=5.1
5.4-0.6X=5.1
0.6X=5.4-5.1
X=0.3/0.6
X=1/2
0.5(3+X)=6.2
3+X=6.2/0.5
X=12.4-3
X=9.4
X÷0.5-10+2=0
X÷0.5-8=0
X÷0.5=0+8
X=8×0.5
3×1.8-0.6X=5.1
5.4-0.6X=5.1
0.6X=5.4-5.1
X=0.3/0.6
X=1/2
0.5(3+X)=6.2
3+X=6.2/0.5
X=12.4-3
X=9.4
X÷0.5-10+2=0
X÷0.5-8=0
X÷0.5=0+8
X=8×0.5