解:(1)
![](http://thumb.1010pic.com/pic5/latex/335.png)
×6+2x=2.6,
2.4+2x=2.6,
2.4+2x-2.4=2.6-2.4,
2x÷2=0.2÷2,
x=0.1;
(2)x-
![](http://thumb.1010pic.com/pic5/latex/96.png)
x=36,
![](http://thumb.1010pic.com/pic5/latex/365.png)
x=36,
![](http://thumb.1010pic.com/pic5/latex/365.png)
x×
![](http://thumb.1010pic.com/pic5/latex/304.png)
=36×
![](http://thumb.1010pic.com/pic5/latex/304.png)
,
x=48;
(3)(0.8+x)×25%=0.5,
(0.8+x)×25%÷0.25=0.5÷0.25,
0.8+x-0.8=2-0.8,
x=1.2.
分析:(1)先化简,再根据等式的性质,在方程两边同时减去2.4,再除以2求解,
(2)先化简,再根据等式的性质,在方程两边同时乘
![](http://thumb.1010pic.com/pic5/latex/304.png)
求解,
(3)根据等式的性质,在方程两边同时除以0.25,再减去0.8求解.
点评:本题考查了学生根据等式的性质解方程的能力,注意等号对齐.