请问数学:问题一5x+2/4x=36解(5+2/4)x=365.5x=36x=36÷5.5x=72/11问题二5x+2/4x=36 这样做(5x+1/2x)×2=36×210x+1x11x=72x=72/11它们两种方法有区别吗?敬请高手赐教好吗谢谢