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a fost răspuns

2x3x4+7x4~3x7=20~4x5+3x3x4~2x2~1

~ = reprezinta minus

Răspuns :

Andreearaluca1
24+28-21=20-20+36-4-1
31= 31
Laurycaaryon
2x3x4+7x4-3x7=20-4x5+3x3x4-2x2-1
=6x4+28-21=20-20+9x4-4-1
=24+18-21=20-20+36-4-1
=42-21=0+36-4-1
=21=32-1
=21=31
este gresit!!

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