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8-[6400:16-(360-ax2)x5]:20=3 va rog sa ma ajutati

Răspuns :

8-[6400:16-(360-ax2)x5]:20=3
8-[400-(360-2a)x5]:20=3
8-[400-1800+10a]:20=3
8-(10a-1400):20=3
8-3=(10a-1400):20
5x20=10a-1400
100=10a-1400
100+1400=10a
a=1500:10
a=150