3.2x-1.2=45.2 3.2x=45.2+1.2 3.2x=46.4 x=46.4÷3.2 x=14.5
3.2x-1.2=45.2解：3.2x=45.2+1.2 3.2x=46.4 x=46.4÷3.2 x=14.5
3.2X等于46.4 46.4除以3.2等于14.5
