解:12%+12x=612x二6-12%12ⅹ=6-0.1212ⅹ二5.88Ⅹ二5.88÷12ⅹ二0.49
两边都除以12，得0.01+x=0.5,x=0.49.
12％+12x=612/100+12x=612x=6-12/10012x=600/100-12/100x=588/100÷12588/12=49x=49/100
