Răspuns :
a+b = 45
b = a ×4
a =? b=?
a |----------|----------|----------|----------|
b |----------| } 45.
45 : 5= 9 (b)
9 ×4 = 36 (a)
Proba : 36+9=45.
b = a ×4
a =? b=?
a |----------|----------|----------|----------|
b |----------| } 45.
45 : 5= 9 (b)
9 ×4 = 36 (a)
Proba : 36+9=45.