👤

402+[1002:3-(100+a)x2]:14=408

Răspuns :

[334-(100+a)x2]:14=408-402
334-(100+a)x2=6x14
-(100+a)x2=84-334
-(100+a)x2=-250 (-1)
200+2a=250
2a=250-200
a=50:2
a=25