14x-x=169和1.7x十0.5x=4.4怎么检验?

14x-x=169和1.7x十0.5x=4.4怎么检验? X.(X十1)x(X十2)x(x十3) =360 x十24十x=34 2(x十3)=3(0.5x十10) 18=(?)十(?)x(?) 3十x十x=5x, (x+12)X(x十12)=xXx十360 3x十9x十X=26. x的平方十x(x十4)=30, 解方程(3x十3)(x十2)=x十14 x十5十x十6…=1000 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x十x十y十y=54?x十x十y十y=46?x,y各等于多少? x^5十3x=?和2x^3-4x+6=? 3x十7x十5x一7x=17十18 已知f（x）=2X十|,X≥O;X^2十4,x 5x十4x=36 x十2.5x=0.7