3x816的精选

先要求出方程的解是多少。解：两边同时加8&nbsp&nbsp3x=24。两边同时除以3&nbsp&nbspx=8检验：把x=8代入方程的左边。左边=3*8—8&nbsp&nbsp&nbsp&nbsp=16&nbsp&nbsp&nbsp=方程右边所以，x=8是原方程的解。...