방정식 을 풀다.
50%x=11.60.5x=11.6x=11.6÷0.5x=23.2%의 35x=4 0.35x=4x=4÷0.35x=80/7x-100%의 75x=28x-0.75x=280.25x=28 x=28÷0.25x=1121/5x-100%의 20=7.50.2x-0.2=7.5.0.2x=7.5+0.2=7.7x=7.7 x=7.7÷0.2x=38.5
50%x=11.60.5x=11.6x=11.6÷0.5x=23.2%의 35x=4 0.35x=4x=4÷0.35x=80/7x-100%의 75x=28x-0.75x=280.25x=28 x=28÷0.25x=1121/5x-100%의 20=7.50.2x-0.2=7.5.0.2x=7.5+0.2=7.7x=7.7 x=7.7÷0.2x=38.5