A+R+M= 188
R = A*2
M = R+13
⇒ M = A*2+13
AFLAM CATE CASTANE A CULES ALINA
A+2A+2A+13=188
5A=188-13
5A= 175
A=175/5
A=35
aflam cate castane a cules radu
R = 2*A
R = 2*35
R = 70
aflam cate castane a cules Mihai
M= R+13
M = 70+13
M= 83
Verificare
35+70+83 = 105+83 = 188