2/5x=37(58-x)

2/5x=37(58-x) x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 x(x-2)-2x(x+1)-3x(x-5) 其中x=负½ (x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3) x-2x+3x-4x+5x.+99x-100x=25求解 2x+3x+4x+5x+x+6x+7x=100 x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x f(x,-x)=x^2+2x,fx(x,-x)=5x+1,则fy(x,-x)= x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? x^5-2x^3+x=? (37-x)/(67-x)=2/5 写过程x(x-1)+2x(x+1)-3x(2x-5)-x(3x-2)+2x(2-x)=-5x(x-2)-4 21分之10x÷3分之2=7分之3x-3分之1x-2分之1x=190x-53x=7408.5x-6.9x=43.3x-200=0.2x+1101.02+0.4x+2.6x=3.428.9x-67=4.5x+656x-58=3x+1410x-20=5x+806x+5=10x-3420-1.4x=9.8x-288.2x+5.4x=272 解决数独问题x 1 x 7 x x x 3 xx x x x 4 x 2 x x9 x 3 6 x 8 7 x 58 x x x x 9 x x xx x 2 x 5 x x x 4x 3 x x x x 6 x xx x x x x x x x 26 x x x x x x x 7x 5 4 1 7 x 9 8 x这道题我用了很多办法都没有头绪,请帮忙的朋友把解题的思 *-----------------------------------------------*| 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 || 9-3x-4x=4 27+5x-7x=3 7x-9x+26=10 10+x=4+2x 26.6-3x=29.9-6x 14.6+3x=18.8+x 19.5-2x=27-5x 21+4x-x=369-3x-4x=427+5x-7x=37x-9x+26=10 10+x=4+2x 26.6-3x=29.9-6x 14.6+3x=18.8+x19.5-2x=27-5x 21+4x-x=36