解方程:x+2\/x+1-x+3\/x+2=x+6\/x+5-x+7\/x+6
解:通分化简得到 (x+1)(x+2)=(x+5)(x+6)3x+2=11x+30 8x=-28 x=-7\/2
解方程:(x+2)\/(x+1)-(x+4)\/(x+3)=(x+6)\/(x+5)-(x+8)\/(x+7)
(x+1)(x+3)=(x+5)(x+7)x^2+4x+3=x^2+12x+35 8x=-32 x=-4
解方程:x+1\/x+2-x+2\/x+3=x+5\/x+6-x+6\/x+7
(x+1)\/(x+2)-(x+2)\/(x+3)=(x+5)\/(x+6)-(x+6)\/(x+7)化简为:1\/[(x+2)(x+3)]=1\/[(x+6)(x+7)];所以:(x+2)(x+3)=(x+6)(x+7),即:5x+6=13x+42解得:x=-9\/2=-4.5
解方程:x+2分之x+1+x+7分之x+6=x+3分之x+2+x+6分之x+5
x+x\/2+1+x+x\/7+6 = x+x\/3+2+x+x\/6+5 ==>x\/2+x\/7+7 = (x\/3+x\/6)+7 ==>x\/7 = 0 ==>x=0
x+2\/x+1-x+6\/x+5=x+4\/x+3-x+8\/x+7求解方程
解: x+2\/x+1-x+6\/x+5=x+4\/x+3-x+8\/x+7 1+1\/(x+1)-1-1\/(x+5)=1+1\/(x+3)-1-1\/(x+7)1\/(x+1)-1\/(x+5)=1\/(x+3)-1\/(x+7)4\/(x+1)(x+5)=4\/(x+3)(x+7)(x+3)(x+7)=(x+1)(x+5)x²+10x+21=x²+6x+5 4x=-16 x=-4 采纳...
初二数学 解方程 x+2\/x+1+x+8\/x+7=x+6\/x+5+x+4\/x+3
-1\/(x+7) 两边通分可得 [(x+3)-(x+1)]\/[(x+3)(x+1)]=[(x+7)-(x+5)]\/[(x+7)(x+5)]即2\/[(x+3)(x+1)]=2\/[(x+7)(x+5)]∴(x+3)(x+1)=(x+7)(x+5)x²+4x+3=x²+12x+35 4x+3=12x+35 x=-4 经检验,x=-4是原方程的解!
解方程x+2分之x+1+x+7分之x+6=x+3分之x+2+x+6分之x+5
1\/x+7=1\/x+3+ 1\/x+6 (x+7+x+2)\/(x+2)(x+7)=(x+6+x+3)\/(x+3)(x+6)(2x+9)(x+2)(x+7)=(2x+9)(x+3)(x+6)(2x+9)(x^2+7x+2x+14)=(2x+9)(x^2+6x+3x+18)(2x+9)(x^2+9x+14-x^2-9x-18)=0 2x+9=0 x=-9\/2 经检验x=-9\/2是方程的解 ...
初二数学 解分式方程:X+2\/X+1 +X+8\/X+7 = X+6\/X+5 + X+4\/X+3
(x+2)\/(x+1)+(x+8)\/(x+7)=(x+6)\/(x+5)+(x+4)\/(x+3)(x+2)\/(x+1))-(x+4)\/(x+3))=((x+6)\/(x+5)-(x+8)\/(x+7)通分,2\/(x+1)(x+3)=2\/(x+5)(x+7)(x+1)(x+3)=(x+5)(x+7)x=-3\/2 ...
解方程:x+2\/x+1一x+4\/x+3=x+6\/x+5一x+8\/x+7
解方程:x+2\/x+1一x+4\/x+3=x+6\/x+5一x+8\/x+7 我来答 1个回答 #热议# 该不该让孩子很早学习人情世故?匿名用户 2014-04-10 展开全部 更多追问追答 追问 不清楚 追答 已赞过 已踩过< 你对这个回答的评价是? 评论 收起
解方程难题:(x+1)\/(x+2)+(x+6)\/(x+7)=(x+2)\/(x+3)+(x+5)\/(x+6)
解方程难题:(x+1)\/(x+2)+(x+6)\/(x+7)=(x+2)\/(x+3)+(x+5)\/(x+6)。解这道七年级竞赛题目,其实并不难,分母都比分子大一。