13x-6.8x+x=46.
问题描述：
13x-6.8x+x=46.
答
13x-6.8x+x=46.8
6.2X+X=46.8
7.2X=46.8
X=6.5
答
提取公因式（13-6.8+1）x=46.8
则 7.2x=46.8
x=6.5
答
13x-6.8x+x=46.8
（13-6.8+1）x=46.8
7.2x=46.8
x=6.5
答
13x-6.8x+x=46.8
14x-6.8x=46.8
7.2x=46.8
x=6.5
答
13x-6.8x+x=46.8
7.2x=46.8
x=6.5
答
13x-6.8x+x=46.8
7.2x=46.8
0.8x=5.2
x=13/2