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a fost răspuns

[tex] \frac{2-x}{x-1} = \frac{1-x}{x-2} [/tex] mersi

Răspuns :

(2-x)/(x-1)=(1-x)/(x-2)
(2-x)(x-2)=(x-1)(1-x)
2x-4-x²+2x=x-x²-1+x
-x²+4x-4=-x²+2x-1
-x²+x²+4x-2x=-1+4
2x=3
x=3/2

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