Question

Gente me ajudem pfvr ​

Answer 1

Resposta:

Olá!

R.: (2,-3)

Explicação passo a passo:

$\left \{ {{3x-2y=12} \atop {-x+4y=-14}} \right.$

$\left \{ {{3x-2y=12} \atop {-x+4y=-14.(3)}} \right.$

$\left \{ {{3x-2y=12} \atop {-3x+12y=-42}} \right.$

$3x+(-3x)-2y+12y=12+(-42)$

$3x-3x+10y=12-42$

$0x+10y=-30$

$10y=-30$

$y=-\frac{30}{10}$

$y=-3$

$3x-2.(-3)=12$

$3x-(-6)=12$

$3x+6=12$

$3x=12-6$

$3x=6$

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

$x=2$

Bons Estudos!