AB=45 cm
a.
AM/MB= 2/7 => AM = 2K , MB=7K
AM + MB = AB => 2K + 7K = 45 => 9K = 45 => K = 5 =>
AM = 2K = 2 x 5 = 10
MB = 7K = 7 x 5 = 35 .
(Verificare : 10 + 35 = 45 )
=> inseamna rezulta :)
b. AM/MB = 5/4 => AM = 5K , MB = 4K
AM + MB = AB => 5K + 4K = 45 => 9K = 45 => K = 5
AM = 5K => AM = 5 x 5 = 25
MB = 4K => MB = 4 x 5 = 20