0.24*3-5X=0.36 4.2X-1.5X=0.54

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0.24*3-5X=0.36 4.2X-1.5X=0.54
0.24*3-5X=0.36 4.2X-1.5X=0.54

0.24*3-5X=0.36 4.2X-1.5X=0.54
0.24×3-5X=0.36
0.72-5x=0.36
5x=0.36
x=0.072
4.2X-1.5X=0.54
2.7x=0.54
x=0.2

0.24*3-5X=0.36
0.72-5x=0.36
5x=0.72-0.36
5x=0.36
x=0.072
4.2X-1.5X=0.54
2.7x=0.54
x=0.2

B={2,3} 带入A，解x=5 B x -5x+6=0 x=2或x=3 C x +2x-8=0 x=-4或x=2 A∩C为空,则x≠-4,x≠2 所以x=3 3 -3a+a -19

用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+. 0.24*3-5X=0.36 4.2X-1.5X=0.54 一元五次方程 0.56x^5+0.36x^4+0.16x^3-0.04x^2-0.24x-0.44=0 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? (x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3) 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) x-2x+3x-4x+5x.+99x-100x=25求解 2x+3x+4x+5x+x+6x+7x=100 x(x-2)-2x(x+1)-3x(x-5) 其中x=负½ x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? 已知3x*x-x=1,求6x*x*x+7x*x-5x+2000 3x+5x=?x等于 3x+5x-6x=? 3x+5x=8x. x^5-2x^3+x=? 8x(x-5)=3x 写过程x(x-1)+2x(x+1)-3x(2x-5)-x(3x-2)+2x(2-x)=-5x(x-2)-4