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X 1supra x =6 atunci x-1 supra x =...?

Răspuns :

[tex] \frac{x+1}{x}=6 \\ x+1=6x\\5x=1\\x= \frac{1}{5} \\ \\x-1= \frac{1}{5}-1=- \frac{4}{5} \\ \frac{ -\frac{4}{5} }{ \frac{1}{5} } =-4[/tex]