(40-x)(800+40-x*2)=1200

x{x+1}{x-1}}x-2}{x-3}-40 x+40=2x x=? 解分式方程：1/X-2+1/X-6=1/X-7+1/X-11/X-2+1/X-6=1/X-7+1/X-11/(x-2)-1/(x-1)=1/(x-7)-1/(x-6)(x-1-x+2)/(x-2)(x-1)=(x-6-x+7)/(x-7)(x-6)1/(x-2)(x-1)=1/(x-7)(x-6)(x-2)(x-1)=(x-7)(x-6)x^2-3x+2=x^2-13x+4213x-3x=42-210x=40x=4 为什么要移向才能解 x-40%x-1/2x=13 解方程,应该是x-40%x-1/2x=1/13 x{x+1}{x-2}{x-3}-40 分解因式:x(x-1)(x+2)(x+3)-40 x+3/20x=46 ,x-1/5x=40 ,x-1/2x=3/4 ,x-0.2x=18解方程 x-2=(104-x)+2 6x-59=10x-75 (x+10)+(x-15)=280-x4（x-62)=x-38 60x-40=(60+20)*(x-5) 32x+32*0.5-25x+64x=24x+496-49x x+15=3*(109-x ) 5(3x-1.4)=2(6x-0.5) 3(x+0.9)=5(x-1.7) 13x-4(2x+5)=17(x-2)-4(2x-1) (13x+8)/3=5x-1x-60=2[(3561-x)+100]+1 (x+9)+12=2[(x-9)-1 60％x+25=40 x+30％x=52 19-120％x=7 4分之3x-5％x=17.5 x-10％x=18 （1-25％）x=36 2x+30％x=9.2 x-40%x= 解方程 x-1%x=19.8x-40%x=15x+25%x=2.550%x+x=31.5x-15%x=8.5 解方程:(x/x-1)^2+(x/x+1)^2=40/9 ..= = x-(2/3x-1)-{40%(x-2/3x-1)+1}=4 解方程[x/(x-1)]^2+[x/(x+1)]^2=40/9. 1/4x+5+1/2【x-（1/4x+5）】-5+40=x 40(X-1)+(X-2)=10(X-1)+X+58 （x+1）（x+2）（x-4）（x-5）=40 x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,