Question

mihai si alin au impreuna 60 de lei. daca mihai ar avea de doua ori mai multi lei si alin de 5 ori mai multi lei, ei ar avea impreuna 180 lei.
cati lei are mihai?
cati lei are alin?

Answer 1

M+A=60
2M+5A=180
M=?
A=?
M+A=60
2M+5A=180
------------(+)
3M+6A=240|:3
M+2A=80
M+A=60
-------(-)
A=20
60-20=40
M=40

Answer 2

180-60=120 (5 parti egale) 120÷5=24(lei are mihai) 60-24=36(lei are alin)