(x-5)+(x-3)+x+(x+3)+(x+5)=45,x等于?
3x+5x=?x等于
(x-5)+(x-3)+x+(x+3)+(x+5)=45,x等于?
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
3x-x-5x等于多少?
2x(5x+3)=3x(5x+3x)中x等于多少
(x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几?
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
x+2x-3x-4x+5x+6x-7x.-196x+197x+198x-199x-200x 等于多少
3X(X-1)-X(3X-5)=8X等于多少
4x-3(x-5)=2x+(x-1) x等于多少
x/3-3/5=4x,x等于多少.