3x=2+2x等于
2x(5x+3)=3x(5x+3x)中x等于多少
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
1X+2X+3X…+98X+99X+100X=50500X X等于多少?
(x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几?
2X-3/5=X/3 X等于多少?
5x+2=3x,x等于多少
-2x+3=-10+8x x等于
2x=3x,则x等于多少?
x(x-3)=2,x等于多少?
x减3分之2x等于15 x等于
3X的平方等于2X,X等于
(x-1)(x-2)(x-3)(x-4)=0,求x等于多少,