设甲堆原有煤x千克.(x-160)∶(5/6x+160)=2∶3怎么算?
7x(x-6)+3x=4x(2x+5)怎么解这个方程
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
2x+3x+4x+5x+x+6x+7x=100
(x+5)²-(x-2)(x-3) =x²+10x+25-(x²-5x+6) *5x怎么来
(2x+1)²-(x+3)(3-x)=6x怎么简便算?
(-x+2x²+5)+(4x²-3-6x)怎么算?
5x-4/x-2=4x 10/3x-6-1 怎么解
(X-3)/(X^2-4)*(X^2-4X+4)/(x^2-x-6)-1/(x+2)怎么算?
7x-3(2/3x+1/5x)-(x+2/5x)+2x,=5x怎么求出
2X=5X怎么算?
X/2-5X+11/6=1+2X-4/3怎么算