4.7+3x=11
4.7+3x-4.7=11-4.7
3X=6.3
3X÷3=6.3÷3
X=2.1
4/9y-5/6=1又1/3两边加上5/6得:4/9y-5/6+5/6=1又1/3﹢5/6﹙4/9﹚Y=1/2两边除以4/9得:﹙4/9﹚Y÷﹙4/9﹚=1/2÷﹙4/9﹚Y=9/8
4/9y-5/6=1又1/3两边加上5/6得:4/9y-5/6+5/6=1又1/3﹢5/6﹙4/9﹚Y=13/6两边除以4/9得:﹙4/9﹚Y÷﹙4/9﹚=13/6÷﹙4/9﹚Y=39/8
1/8=y/4+1/2两边减去1/2:1/8-1/2=y/4+1/2-1/2y/4=-3/8两边乘4:﹙y/4﹚×4=﹙-3/8﹚×4Y=-3/2