Răspuns :
exista 2 variante
- 28 :4 = 7 6 x 3 + 7 = 18 + 7 = 25
- 6 x 3 + 28 :4 = 18 + 7 = 25
- 28 :4 = 7 6 x 3 + 7 = 18 + 7 = 25
- 6 x 3 + 28 :4 = 18 + 7 = 25