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COROANA
1) [(624+123:3-a):6]x3+254=554

2) 9 236-[(3 245-1 236+63x4:2):5+a]+23 124=31 860



Răspuns :

1)[(624+123:3-a):6]x3+254=554
[(624+123:3-a):6]x3=554-254
[(624+123:3-a):6]x3=300
(624+123:3-a):6=300:3
(624+123:3-a):6=100
624+123:3-a=100x6
624+123:3-a=600
624+41-a=600
665-a=600
a=65

2)
9236-[(3245-1236+63*4:2):5+a]+23124=31860
9236-[(1009+63*2):5+a]+23124=31860
9236-[(1009+126):5+a]=23124=31860
9236-[1135:5+a]+23124=31860
9236-[227+a]+23124=31860
9236-227-a+23124=31860
9099-a=31860-23124
9099-a=8736
a=9099-8736
a=363