4.7+3x=11
4.7+3x-4.7=11-4.7
3X=6.3
3X÷3=6.3÷3
X=2.14/9y-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=9／84/9y-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=39／81/8=y/4+1/2两边减去1／2：1/8-1／2=y/4+1/2-1／2 y/4=-3／8两边乘4：﹙y/4﹚×4=﹙-3／8﹚×4Y=-3／2