1÷2x一5=-2/3x十6

5x十2x=42 15十2x一3=48 2x十3x十17=37 6x一3x=6÷5 9x一2x=15x十2x=4215十2x一3=482x十3x十17=376x一3x=6÷59x一2x=1.4十0.077(2x一6)=15.4 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 3(2x一1)十5(1一2x)十2x十4=0怎么解 x^2(x十3)十x(x^2一3)十3x(x^2+x一1) 用不用化到x(5x^2十6x一6) 数学题 3x(2x十1)一(2x十3)(2x十3)(x一5) (2x三次方一x十6)x(3x2十5x一2) 解方程:(x一3)(x十1)=x(2x十3)一(x的平方十1) (一x十2x的平方十5)十(4x的平方一3一6x) 1/(x^2一4x十3)十1/(x^2一8x十15)十1/(x^2-12x十35)十1/(x^2一16x十63)= 解方程：43一2(5十3X)二3十6(x一1) 1/x^2一6x十8=1/x^2一4x十3x^2一6x十8和x^2一4x十3 (1)3X十6X一5=0 (2)4X一X一9=0, 7(x十4)=2(2一x)十3(4x一2) 6(2x一7)=5(x十8)十9 5(1十2x)=3(x一2)十3(17一x) 计算:6x2一(2x一1)(3x一2)十(x十2)(x一2)一x(x十7)这题怎么做? 10(3x十2)一20=5(2X一1)一4(2x十1) 若|y十5|十(5x十1)平方=O,求代数式一3(2x一y)一[7x一(6X十2y)]的值 1÷2x一5=-2/3x十6 解方程组 2x一y十3z=3 3x十y一2Z=-1 x十y十Z=5