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Bfhidj
a fost răspuns

ajutorrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr va rog (d×4+20):4=12

Răspuns :

d4+20=12x4
d4+20=48
d4=48-20
d4=28
d=28:4
d=7
(dx4+20):4=12....(4d+20)=12x4.....4d+20=48.....4d=48-20....4d=28.....d=28:4=7