(1/45+1/60-1/90)x=1
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x/45+x/90-x/60=1 解方程
x(x-1)(x+1)=60
X(X-1)=X
(x-2)/30+(x-3)/45+x/90=1
60(x+1)=90(x-1)
60(x+1)=90(x-1)
45X(x+1)=60X 怎么解
X/60-X/90=1,求X的值?
x/45=1+(x+30)/60
X/45=(X+30)/60-1
x/60=(x-1)/45
(x-15)/45=(x/60)+1
45X=60(X-1)
x/45=(x+30)/60+1 x=270x/45=(x+30)/60+1x=270
X(X-1)=90
60-1/5x+90=x
X/X+1=60%- -
50x(x-1)+60x(x-4)=5100