2x+1.4*6=9.82x+1.4*6-1.4*6=9.8-1.4*62x=1.4x=0.7
x=（9.8-1.4*6）/2=1.4/2=0.7
2x+1.4*6=9.82x+8.4=9.82x=9.8-8.4x=1.4/团闷慎纤2x=0.7 or 7/塌孝弯10
2x+8.4=9.82x=1.4x=0.7
请问几年级的x=1.7
