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[675-126×3+(426:3+108×a):2]:4×6=714



Aflati-l pe a.


Răspuns :

297+(142+108a)/2=714/6*4
297+(142+108a)/2=476
(142+108a) /2=476 - 297
142+108a=179*2
142+108a=358
108a=358 - 142
108a=216
a = 216/ 108
a=2