Question

RESOLVA O SISTEMA:
2x + y = 5
8x - y = 5

Answer 1

{2x+y=5
{8x-y=5
10x=10
x=10/10
x=1
2x+y=5
2.1+y=5
2+y=5
y=5-2
y=3
S={(1, 3)}