Question

resolva do jeito que achar melhor

{x=3y-1
{2y+1=12

Answer 1

2y+1=12
2y = 12-1
2y = 11
y = 11/2

x = 3y-1
x = 3.11/2-1
x = 33/2-1
x = 33-2/2
x = 31/2

S = (31/2,11/2)