Răspuns :
a + a : 4 = 75
a |------|------|------|------| } 75
a : 4 |------|
75 : 5 ( segmente ) = 15
a : 4 = 15
a = 15 × 4
a = 60 ( numarul )
a + a : 4 = 75
a |------|------|------|------| } 75
a : 4 |------|
75 : 5 ( segmente ) = 15
a : 4 = 15
a = 15 × 4
a = 60 ( numarul )