Question

resolva o sistema a seguir:
{3x + y = 6
{4x - 5y = -11

Answer 1

Resposta:

x = 1 e y = 3

Explicação passo a passo:

{3x + y = 6

{4x - 5y = -11

$\left \{ {{3x + y=6} \atop {4x-5y =-11}} \right. => \left \{ {{3x + y=6}.5 \atop {4x-5y =-11}} \right. =>\left \{ {{15x + 5y=30} \atop {4x-5y =-11}} \right. =>19x = 19 => x = \frac{19}{19} => x = 1$

3x + y = 6 => 3(1) + y = 6 => y = 6 -3 => y = 3