Question

Resolva o sistema:
5x+3y=11
6x-y=4

Answer 1

{5x+3y=11
{6x-y=4.(3)
{5x+3y=11
{18x-3y=12
23x=23
x=23/23
x=1
5x+3y=11
5.1+3y=11
5+3y=11
3y=11-5
3y=6
y=6/3
y=2
S={1, 2}