5x十4x=36

5x十4x=36 已知1十x十x^2 十x^3=0,求x十x^2十x^3十x^4+x^5十x^6+x^7十x^8的值 X十1十4/5X=1十7/8(X-1)十(X一1)怎么算 4(x十5)+x=80 x十5十x十6…=1000 3十x十x=5x, x的平方十x(x十4)=30, 5x一3x十4一1十3=12 x二? 3x十7x十5x一7x=17十18 2x十5=17,8x-3x=6.5,6x十3x=36, 3(2x一1)十5(1一2x)十2x十4=0怎么解 2x十8十3x十8十4x十8=?请算出这道题目求士寸佰了⑥ x十1/3[x十1/3(x-9)]=1/9(x-9)-1解方程; 1/9{1/7[1/5((x十1/3[x十1/3(x-9)]=1/9(x-9)-1解方程; 1/9{1/7[1/5((x十2)/3十4)十6]十8}=1求x! 5X十(X十1)=19怎么解, x^2十5x十10700=12000 4X十3(X十1)=31 x^2十2x十1=4 X十3X十4=24怎么解?