2.6x+1.9=7.1 5x-6=14
2.6x+1.9=7.1 5x-6=14
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
2x+3x+4x+5x+x+6x+7x=100
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
1、14x(x+6)-6x=8x(2x+5)
x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=?
已知3x*x-x=1,求6x*x*x+7x*x-5x+2000
(X-5)(X-6)=X-5
6/x+1=x-5/x^2+x
x-1=3x+3 x-3=12-4x 6x-14=5x-10 x+1=2-4x
(3x+5)/(x+2)+(3x+26)/(x+9)=(3x+17)/(x+6)+(3x+14)/(x+5) 解方程