Răspuns :
Notam cu x totalul de masini
4x/5 + 30 = x
Numitor comun 5
4x+150=5x
=>x=150 masini
4x/5 + 30 = x
Numitor comun 5
4x+150=5x
=>x=150 masini
5/5 - 4/5 = 1/5
1/5 ............ 30
5/5................x
x = 30 x 5/5 / 1/5 = 30 x 5/5 x 5/1 = 30 x 5 = 150 masini
1/5 ............ 30
5/5................x
x = 30 x 5/5 / 1/5 = 30 x 5/5 x 5/1 = 30 x 5 = 150 masini