13x-6.8x+x=46.

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13x-6.8x+x=46.
13x-6.8x+x=46.

13x-6.8x+x=46.
13x-6.8x+x=46.8
7.2x=46.8
x=6.5

13x-6.8x+x=46.8
14x-6.8x=46.8
7.2x=46.8
x=6.5

13x-6.8x+x=46.8
6.2X+X=46.8
7.2X=46.8
X=6.5

13x-6.8x+x=46.8
7.2x=46.8
0.8x=5.2
x=13/2

13x-6.8x+x=46.8
（13-6.8+1）x=46.8
7.2x=46.8
x=6.5

提取公因式（13-6.8+1）x=46.8
则 7.2x=46.8
x=6.5

13x-6.8x+x=46. （X+X)+(X-X)+(X*X)+(X/X)=100 x*x*x*x*x=80000? 13x-6.8x+X=46.8怎么解 13x-6.8x=46.8-x的解方程 4x+9x=13x X+13%X-28%X=3. x+13%x-28%x=3.4 13x-15x+x=-3 x*x-10*x=13急 6.8x-x=20.3 10x+[13-x]+9=10[13-X]+X (13-x)*10+x+27=10x+13-x 2*x*x+2.5x=13 x=? 13x-6.3x+x=46.8 x=多少 x+5.5x=13 (x-10)/(x-11)+(x-16)/(x-17)=(x-12)/(x-13)+(x-14)/(x-15)快,急用解方程((13x-x^2)/(x+1))(x+(13-x)/(x+1))=42