12-3x-4x=8x-24-5x解:移项,得-3x-4x-8x+5x=-24-12合并同类项,得-10x=-36系数化为1,得x=3.6
12-3x-4x=8x-24-5x解:12-7x= 3x -2410x = 36x = 3.6