5x+3=6x-5
x/x-3-5x/x^2-x-6计算
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
2x+3x+4x+5x+x+6x+7x=100
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
已知3x*x-x=1,求6x*x*x+7x*x-5x+2000
6x+3x-5x
x+2x-3x-4x+5x+6x-7x.-196x+197x+198x-199x-200x 等于多少
填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x
6x+3=7x(x+5)
(x-4)(2x-5)-(3x-2)(x+6)
X^4-X^3-5X^2-6X-4