x+4.5=1.8➗6x=0.3-4.5x=-4.2
x+4.5=1.8/6x+4.5=0.3x=0.3-4.5x=-4.2
（x+4.5）×6 =1.8 （x+4.5）×6÷6 =1.8 ÷6x+4.5=0.3x+4.5-4.5=0.3-4.5x=-4.2
解：俩边同除以6 x+4.5=0.3 移项 x=0.3-4.5 x=-4.2
