9x+4×1.2=6.6解:9X+4.8 =6.6 9x+4.8-4-8=6.6-4.8 X=0.2
9x+4×1.2=6.69x+4.8=6.69x=6.6-4.89x=1.8x=0.2
9x+4×1.2=6.69x=6.6-4.8x=0.2
6.6-4.8=1.8
9x=11.4