作业帮解方程:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)写清楚一点
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解方程:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)写清楚一点
解方程:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)
写清楚一点
解方程:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)写清楚一点
(x+3)/(x+2)+(x+9)/(x+8)=(x+5)/(x+4)+(x+7)/(x+6)
1+(x+5)/(x+2)(x+8)=1+(x+5)/(x+4)(x+6)
x=-5
[(x+3)(x+4)-(x+5)(x+2)]/[(x+2)(x+4)]=[(x+7)(x+8)-(x+9)(x+6)]/[(x+6)(x+8)]
(x^2+7x+12-x^2-7x-10)/[(x+2)(x+4)]=(x^2+15x+56-x^2-15x-54)/[(x+6)(x+8)]
1/[(x+2)(x+4)]=1/[(x+6)(x+8)]
(x+2)(x+4)=(...
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[(x+3)(x+4)-(x+5)(x+2)]/[(x+2)(x+4)]=[(x+7)(x+8)-(x+9)(x+6)]/[(x+6)(x+8)]
(x^2+7x+12-x^2-7x-10)/[(x+2)(x+4)]=(x^2+15x+56-x^2-15x-54)/[(x+6)(x+8)]
1/[(x+2)(x+4)]=1/[(x+6)(x+8)]
(x+2)(x+4)=(x+6)(x+8)
x^2+6x+8=x^2+14x+48
8x=-40
x=-5
经检验，x=-5是原方程的根
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