15X+8=2X-26,5X+8=2X-27,0.3X-1.5=X+0.6 ,0.125X+2.75=-1.25X 0.35X-1.5=-2.15X+3.5,0.125X+2.75=-1.25X ,0.35X-1.5=-2.15X+3.5

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15X+8=2X-26,5X+8=2X-27,0.3X-1.5=X+0.6,0.125X+2.75=-1.25X0.35X-1.5=-2.15X+3.5,0.125X+2.75=-1.25X,0.35

15X+8=2X-26,5X+8=2X-27,0.3X-1.5=X+0.6 ,0.125X+2.75=-1.25X 0.35X-1.5=-2.15X+3.5,0.125X+2.75=-1.25X ,0.35X-1.5=-2.15X+3.5
15X+8=2X-26,5X+8=2X-27,0.3X-1.5=X+0.6 ,0.125X+2.75=-1.25X 0.35X-1.5=-2.15X+3.5
,0.125X+2.75=-1.25X ,0.35X-1.5=-2.15X+3.5

15X+8=2X-26,5X+8=2X-27,0.3X-1.5=X+0.6 ,0.125X+2.75=-1.25X 0.35X-1.5=-2.15X+3.5,0.125X+2.75=-1.25X ,0.35X-1.5=-2.15X+3.5
15x+8=2x-26
15x-2x=-26-8
13x=-34
x=-2又13分之8
5X+8=2X-27
5x-2x=-27-8
3x=-35
x=-11又3分之2
0.3X-1.5=X+0.6
03x-x=0.6+1.5
-0.7x=2.1
x=-3
0.125X+2.75=-1.25X
0.125x+1.25x=-2.75
1.375x=-2.75
x=2
0.35X-1.5=-2.15X+3.5
0.35x+2.15x=3.5+1.5
2.5x=5
x=2
0.125X+2.75=-1.25X
0.125x+1.25x=-2.75
1.375x=-2.75
x=-2
0.35X-1.5=-2.15X+3.5
0.35x+2.15x=3.5+1.5
2.5x=5
x=2

matlab解决约束非线性规划问题myfun.mfunction f=myfun(x)f=x(1)*x(13)+x(2)*x(14)+x(3)*x(15)+x(25)+1.697*(x(4)*x(16)+...x(5)*x(17)+x(6)*x(18)+x(26))+0.575*(x(7)*x(19)+x(8)*x(20)...+x(9)*x(21)+x(27))+0.723*(x(10)*x(22)+x(11)*x(23)+x(12)*x(24)); matlab解决约束非线性规划问题myfun.mfunction f=myfun(x)f=x(1)*x(13)+x(2)*x(14)+x(3)*x(15)+x(25)+1.697*(x(4)*x(16)+...x(5)*x(17)+x(6)*x(18)+x(26))+0.575*(x(7)*x(19)+x(8)*x(20)...+x(9)*x(21)+x(27))+0.723*(x(10)*x(22)+x(11)*x(23)+x(12)*x(24)); x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 15X(4X-8)-5X(2X+10)=6X(5X-20) (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程 X(x平方-6x-9)-x(x平方-8x-15)+2x(3-x)其中x=-六分之一 x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || x(x*x-6x-9)-x(x*x-8x-15)+2x(3-x) 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, (5x-2)*(x+8)=5x*x+98 8x+3(x-2)=5x+(x-3) X-5+8*X=7*X-2*X-1 x-8/x-4=2-x-5/x-7 1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8 好多年没有用过过数学公式了 想不起来怎么算了 想知道 X值是多少