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2013:(x-2012)=2013rezolvare

Răspuns :

2013:(x-2012)=2013
x-2012 = 2013:2013
x-2012 = 1
x=1+2012
x=2013

verificare

2013:(2013-2012) = 2013
2013:1 = 2013
2013=2013 ADEVARAT


2013:2013=x-2012
x-2012=1
x=2012+1
x=2013