2x28的精选

列式：28-2x＝28-2x＝28-28-2x＝0x＝0此题目是是移项，把常数项移动到方程的右边之后，再进行合并同类项久后，得到-2x＝0得x＝0。&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp28一2x=28解:&nbsp&nbsp28一2x+2x=28+2x&nbsp&nbsp&nbsp&nbsp&nbsp&n...