Question

alina si mihai au 100 de lei.alina are de 4 ori mai mult decat mihai aflati cu cati lei are mai mult alina de cat mihai

Answer 1

A+M=100
A=4•M

4M+M=100
5M=100
M=100:5=20
A=20•4=80
80-20=60

Answer 2

$4m + m = 100 \\ 5m = 100 \\ m = 100 \div 5 = > m = 20 \\ a = 20 \times 4 = > a = 80$