Răspuns :
a - suma economisita de Mihai
2/5 din a = 2a/5 - suma cheltuita
a - 2a/5 = 72 /x5
5a - 2a = 360
3a = 360
a = 360 : 3
a = 120 lei a economisit Mihai in vacanta
2/5 din a = 2a/5 - suma cheltuita
a - 2a/5 = 72 /x5
5a - 2a = 360
3a = 360
a = 360 : 3
a = 120 lei a economisit Mihai in vacanta
/**/**/--/--/--/
/**/**/= a cheltuit
/--/--/--/=ramas=72
72:3=24
24*5=120 lei (total)
/**/**/= a cheltuit
/--/--/--/=ramas=72
72:3=24
24*5=120 lei (total)