Question

suma varstelor lui A+B=19 , A+C=37 , B+C=52. Cat ani are fiecare???

Answer 1

A+C=37⇒A=37-C
B+C=52⇒B=52-C
A+B=19⇒37-C+52-C=19⇔-2C+89=19⇔-2C=-70⇒C=35
A=2
B=17

Answer 2

a+b=19 a+c=37 => 2a+bc=56 2a +bc=56 2a+52=56 2a=4 a=2 b=17 c=35