Question

3x+y= -12
4x+y=20
Método da substituição

Answer 1

S = {32,-108}

{3x+y= -12 => y = -12-3x

{4x+y=20

4x+y=20

4x-12-3x = 20

x = 20+12

x = 32

y = -12-3x

y = -12-3.32

y = -12-96

y = -108

S = {32,-108}

Ótima tarde ❤️

27/09/22