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Afla necunoscuta: (3x9+7xh-53)+5x2-(12-4x2)=6x6
clasa a 3a


Răspuns :

(3x9+7xh-53)+5x2-(12-4x2)=6x6
(27+7xh-53)+10-(12-8)=36
(27+7xh-53)+10-4=36
(27+7xh-53)+6=36
27+7xh-53=36-6
27+7xh-53=30
27+7xh=30+53
27+7xh=83
7xh=83-27
7xh=56
h=56:7
h=8