9x=8x-6 ,8y=4y+1 ,0.6x=3+1/3x和0.02x=0.8x-7.

y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1 9y=3x-(x-1),4(x+y)-(2x+4)=8y ｛4/(x+y)+6/(x-y)=3 ｛9/(x-y)-1/(x+y)=1 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 2x+3y-1=y-x-8=x+6,则x= 有几道题想请教一下7x=6x-4 x-15=74 3x=2x+5 -5x=8-4x 9y=6y-6 8x=4x+1 7x 解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= {3(x+y)+3(y+x)=1,3(x+y)+4(y-x)=-1 函数,y=3x/(x^2+x+1) ,x 函数y=3x/(x^2+x+1) （x