（3x+5)/(x+2)+(3x+26)/(x+9)=(3x+17)/(x+6)+(3x+14)/(x+5) 解方程

来源：学生作业帮助网 编辑：作业帮 时间：2024/11/16 20:39:13

（3x+5)/(x+2)+(3x+26)/(x+9)=(3x+17)/(x+6)+(3x+14)/(x+5) 解方程
（3x+5)/(x+2)+(3x+26)/(x+9)=(3x+17)/(x+6)+(3x+14)/(x+5) 解方程

（3x+5)/(x+2)+(3x+26)/(x+9)=(3x+17)/(x+6)+(3x+14)/(x+5) 解方程
（3x+5)/(x+2)+(3x+26)/(x+9)=(3x+17)/(x+6)+(3x+14)/(x+5)
[3x+2)-1]/(x+2)+[3(x+9)-1]/(x+9)=[3(x+6)-1]/(x+6)+[3(x+5)-1]/(x+5)
1/(x+2)+1/(x+9)=1/(x+6)+1/(x+5)
1/(x+2)-1/(x+5)=1/(x+6)-1/(x+9)
3/(x+2)(x+5)=3/(x+6)(x+9)
7x+10=15x+54
x＝﹣11/2

[3(x＋2)－1]/(x＋2)＋[3(x＋9)－1]/(x＋9)＝[3(x＋6)－1]/(x＋6)＋[3(x＋5)－1]/(x＋5)
3－1/(x＋2)＋3－1/(x＋9)＝3－1/(x＋6)＋3－1/(x＋5)
1/(x＋2)＋1/(x＋9)＝1/(x＋6)＋1/(x＋5)
(2x＋11)/[(x＋2)(x＋9)]＝(2x＋11)/[(x＋6)(x＋5)]
∴2x＋11＝0
∴x＝﹣11/2

[3（x+2)-1]/(x+2)+[3(x+9)-1]/(x+9)=[3(x+6)-1]/(x+6)+[3(x+5)-1]/(x+5)
化简得1/(x+2)+1/(x+9)=1/(x+6)+1/(x+5)
变形得1/(x+2)-1/(x+5)=1/(x+6)-1/(x+9)
得3/(x+2)(x+5)=3/(x+6)(x+9)
即7x+10=15x+54
得x=-5.5

*-----------------------------------------------*| 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 || 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 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 (X-5)(X+3)+(X-2)(X+4)=26 x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 (x+3x+5x...+2009x)-(2x+4x+6x+...+2010x) x/x-3-5x/x^2-x-6计算 x^5-x^4+x^3-x^2+x-1 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X 计算:x/x-2 - 5x/x²-x-6计算:x/x-3 - 5x/x²-x-6 难倒爱因斯坦的九宫格X 7 X | X 8 1 | X X X |X X X | X 4 X | 7 5 9 |X X 5 | 7 X 9 | X 1 4 |5 X X | X X 8 | 3 9 X |3 9 6 | 4 X 7 | X X 2 |X 8 7 | 9 X X | X X X |4 X X | 6 X 5 | X X X | X X 4 | X X 1 |2 X X | X X X | X X X | X 3 X | X X X |X 6 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? x(x*x-6x-9)-x(x*x-8x-15)+2x(3-x) 如下9*9宫图如何填x x x 1 x x x 2 9x x 5 x x x x x 4x 6 8 x x x x x xx x x 7 x x 5 x xx 2 x x 6 x x 8 xx x 3 x x 9 x x xx x x x 5 x 1 6 x 4 x x x 3 x x x x 7 x x x x 2 x x x 七年级下册政治复习提纲(山东人民出版社)第五单元是 青春的脚步 青春的气息别弄错了啊!格式：X X X X X X X X X 1、X X X X X X X X X X.2、X X X X X X X X X.3、X X X X X X X X X X X. 解九宫格题目（X为未知数）9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1 (x-5)2-(x+2)(x-3) (x-5)(x-5)-(x+2)(x-3) (x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3)