Question

a+b+c=20 b+c=a a+c=15 afla:a,b,c

Answer 1

Salut,

a+b+c = 20
b+c = a
a+c = 15.

a+b+c = 20
a+a = 20
2a = 20
a = 20:2
a = 10.

a+c = 15
10+c = 15
c = 15-10
c = 5.

b+c = a
b+5 = 10
b = 10-5
b = 5.

Verificare : a+b+c = 10+5+5 = 10+10 = 20.


Succes! :3

Answer 2

Sper ca te-am ajutat!!