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2 supra 5 X 5 supra 7 + 12 supra 7

Răspuns :

/=supra

2/5x5/7+12/7=
=10/35+12/7=
=10/35+60/35=
=70/35=
=10/5=
=2
2/5×5/7+12/7 = 10/35+60/35= 70/35=2