X*(1+15%)*90%-X=7
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
2x²+7x+1=0 x(x-1)=3x+7
如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少
若1+x+x*x+x*x*x=0,求x+x*x+x*x*x+.+x(2000次幂)
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)
4x-3(x-5)=2x+(x-1) (3x+29)除以8=4x 7(x+10)=5(4x-10) 5分之2(x-15)
已知3x*x-x=1,求6x*x*x+7x*x-5x+2000
1/x-2=7x/(x-2) -3
解方程,- 6分之x-7分之x=84 x-6分之1x=9 3.5*2-0.2x=2 30%x+15=90
因式分解:(1)3x^2+7x+2 (2)5x^2+13x-6=0 (3)6x^2+13x-15=0
解方程:(2x-3)(x+1)-x(x-7)=(x-3)(x+2)