Question

resolva o sistema 2×+y=12 ×+3y=11

Answer 1

Bom dia 

2x + y = 12
x + 3y = 11

6x + 3y = 36
x + 3y = 11

6x - x = 36 - 11
5x = 25
x = 5 
5 + 3y = 11
3y = 11 - 5 = 6
y = 2

S = (5, 2)