Question

{ x + 2y = 16
lx - y = 1​

Answer 1

{ x + 2y = 16

{ x – y = 1 ×(2)

{x+2y=16

+ {2x–2y=2

$3x = 18 \\ x = \frac{18}{3} \\ x = 6$

x–y=1

y=x–1

y=6–1

y=5

S={6,5}

Answer 2

resolução!

x + 2y = 16

x - y = 1 * (2)

_____________

x + 2y = 16

2x - 2y = 2

3x = 18

x = 18/3

x = 6

2y = 16 - x

2y = 16 - 6

y = 10/2

y = 5

S = { X = 6 e Y = 5 }