4x-1.4x-3x+2.4=02.4x-1.4x-3x+2.4=0

分类: 作业答案 • 2022-08-01 13:05:25

问题描述：

4x-1.4x-3x+2.4=0
2.4x-1.4x-3x+2.4=0

答

(2.4-1.4-3)x+2.4=0
(1-3)x=-2.4
-2x=-2.4
x=1.2

答

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