25%x=75%,50%x-25%x=25,x+31%=39.3,x-18%=65.6,20x-30=150请把算式和答案写下来,

x-2x+3x-4x+5x.+99x-100x=25求解 x X 2x=25 2x=25+x. 75%x：(12-x)+25%x=1:2 =(x^2-5x)^2+10(x^2-5x)+24 =x^4-10x^3+25x^2+10x^2-50x+24 这是怎么转化的(X-1)(X-2)(X-3)(X-4) =(X-1)(X-4) (X-2)(X-3)=（x^2-5x+4)(x^2-5x+6)=(x^2-5x)^2+10(x^2-5x)+24=x^4-10x^3+25x^2+10x^2-50x+24=x^4-10x^3+35x^2-50x+24 50x^2+25x-8=0求x 20%x+[25*(20%x)]+12=50%x+2 =（x^2-5x+4)(x^2-5x+6) =(x^2-5x)^2+10(x^2-5x)+24 是怎么转化的(X-1)(X-2)(X-3)(X-4) =(X-1)(X-4) (X-2)(X-3)=（x^2-5x+4)(x^2-5x+6)=(x^2-5x)^2+10(x^2-5x)+24=x^4-10x^3+25x^2+10x^2-50x+24=x^4-10x^3+35x^2-50x+24不好意思我弄错了，是=（x^2-5 解方程:x-2x+3x-4x+...+99x-100x=25 解方程：x-2x+3x-4x+.+99x-100x=25 x-2x+3x-4x+...+99x-100x=25 解方程:X-25%X=30 2X+30%X=9.2 75%X-45%X=12 X+120%X=33 x-25%x=30 2x+30%x=9.2 75%x-45%x=12 x+120%x=33 求解答、还求讲解 x^2+2x-8/x^3+25x+x/(x-2/x-x+4/x+1,其中x=-4/5 若x^3+x^2+x+1=0,则x^-27+x^-26+x^-25+……+x^-1+1+x+……+x^26+x^27 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 解方程：（2x+5)(4x*x-10x+25)=8x(x*x+1) 144=25X*X-X*X*X*X 求X的解,RT