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122+{[(144-5X)÷4+12X]÷2-27}÷15=120

Răspuns :

122-{[(144-5X):4+12x]:2-27}=120X15
122-{[(144-5x):4+12x]:2-27}=1800
122-[(144-5x):4+12x]=2=1800+27

tot asa de la coada la capat