7x-3.4×1=1.227x-3.4=1.227x=1.22+3.47x=4.62x=4.62/7x=0.66
7x-3.4x+1=1.223.6x=1.22-1x=0.22÷3.6x=22/360x=11/180
7x-3.4x=1.22??题怎么都看不懂