来自黄香泉的问题
【4x-1.4x-3x+2.4=02.4x-1.4x-3x+2.4=0】
4x-1.4x-3x+2.4=0
2.4x-1.4x-3x+2.4=0
1回答
2020-05-31 08:01
【4x-1.4x-3x+2.4=02.4x-1.4x-3x+2.4=0】
4x-1.4x-3x+2.4=0
2.4x-1.4x-3x+2.4=0
2.4x-1.4x-3x+2.4=0
移项
3x+1.4x-2.4x=2.4
(3+1.4-2.4)x=2.4
2x=2.4
x=2.4÷2
x=1.2