2x^2+3x=82 x等于多少?
2x(5x+3)=3x(5x+3x)中x等于多少
2X-3/5=X/3 X等于多少?
5x+2=3x,x等于多少
2x=3x,则x等于多少?
x(x-3)=2,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?
2/x-x+1/x=1 X等于多少
(-x)1(-x)2(-x)3(-x^4)等于多少
(x+1)(x+2)(x+3)(x+4)等于多少
(x-1)(x-2)(x-3)(x-4)=0,求x等于多少,
4x-3(x-5)=2x+(x-1) x等于多少