Răspuns :
a+b =143
a - b = 35
a=? b=?
a |----------|35|
b |----------| } 143.
143 - 35 = 108 ( 2 segmente egale)
108 : 2 = 54 (b)
54 +35 = 89 (a)
Proba : 89 + 54 = 143.
89 - 54 = 35.
a - b = 35
a=? b=?
a |----------|35|
b |----------| } 143.
143 - 35 = 108 ( 2 segmente egale)
108 : 2 = 54 (b)
54 +35 = 89 (a)
Proba : 89 + 54 = 143.
89 - 54 = 35.
a+b=143
a-b=35
143+35=178
a=178:2
a=89
b=143-89
b=54
verificare: 89-54=35
89+54=143
a-b=35
143+35=178
a=178:2
a=89
b=143-89
b=54
verificare: 89-54=35
89+54=143