2/3x加50%x等于4.22/3 x+1/2 x＝4.24/6x+3/6x＝4.27/6 x＝4.2x＝4.2÷7/6＝4.2*6/7＝0.6*6＝3.6
如图
2/3x+50%x=4.2(2/3+1/2)x=4.2x=3.6
