Question

a+b+c=20 a+b=c a+c=16 Sa se afle.

Answer 1

a+b+c=20
a+b=c
a+c=16
a+b+c=20  inlocuim
c+c=20
2c=20
c=20:2
c=10
a+c=16
a+10=16
a=16-10
a=6
a+b+c=6+b+10=20
b=20-16
b=4
proba
6+4+10=20
a+c=6+10=16
a+b=c
6+4=10

Answer 2

a+b+c = 20
a+b = c

=> c+c = 20 => 2c = 20 => c = 20:2 => c = 10.

a+c = 16 => a+10 = 16 => a = 16-10 => a = 6

a+b+c = 20 => 6+b+10 = 20 => b+16 = 20 => b = 20-16 => b = 4