(0.2/x+4)-(0.5/x-3)=1.4
(1)3x(x+0.2)=4x(x-1.1)
求1/2x^2-1/4x+0.2x^3+0.25x-0.5x^2-1/5x^3+0.5x-1 其中x=12/13
(0.2/x+4)-(0.5/x-3)=1.4
(X+4)/0.2-(X-3)/0.5=0.2 x-(x-1)/6=3-(x+2)/3 x/12-(2x-1)/20={
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
3x+0.5x=4.2 4x-2.16=1.2 x-0.2x=16 2x-4x[这个x是乘】2.5=3.6 3x+5x=
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
(X-4)(x-2)-2(X-1)(X+3)其中X=-0.5
x-2/0.2-x+1/0.5=3 x=?
2x+3x+4x+5x+x+6x+7x=100
4x-1.4x=-0.5x-9 x- 2x+1/12=1- 3x-2/4 解方程