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ajutor la ecuatia 9+2(14-y)=15


Răspuns :

= 9 + 28 -2y =15 => 9+28-15=2y =>22=2y=>y=11
9+2(14-y)=15 9+2 •14-2y=15 9+28-2y=15 2y=15-28-9 2y=13-9 2y=4 y=4:2 y=2