六道解方程

问题描述:

六道解方程
4×(0.8-x)=1.4
5+2/3x-1/2x=12
10x+9=8x+19
115%x+15%x=1.3
2x-1.6×5=12
7×(23-x)=41+3x

题目太多了请分开求助,我好多赚点采纳数哈:) 多谢啦
4×(0.8-x)=1.4
0.8-x = 1.4 ÷4 = 0.35
x = 0.8 -0.35 = 0.45
5+2/3x-1/2x=12
(2/3x-1/2x)=12 -5
(4-3)x /6 = 7
x = 6x7 = 42