Question

resolva e classifique o sistema:

a+b+c=12
3a-b+2c=14
2a-2b+c=-3

Answer 1

{a+b+c=12
{3a-b+2c=14
{2a-2b+c=-3
:
:
{a+b+c=12
{3a-b+2c=14
:
{a+b+c=12
{2a-2b+c= -3
:
4a+3c=26
4a+3c=21
:
:
{4a+3c=26
{4a+3c=21
:
:
0=5
:
logo:

(a,b,c) =/= 0

E indeterminado