Question

qual e o resultado desse sistema 2×-4¥=36 ×+4¥=6

Answer 1

$\left \{ {{2x-4y=36} \atop {x+4y=6}} \right.$

Somando as equações:
3x-0y=42
3x=42
x=42/3
x=14

Substituindo X:
14+4y=6
4y=6-14
4y=-8
y=-8/4
y=-2

RESPOSTA: S=(14,-2)

Answer 2

2x-4y=36  
x+4y=6
---------------
3x = 42
x = 42/3
x = 14

x+4y=6
14 + 4y = 6
4y = 6 -14
4y = -8
y = -8/4
y = -2

Prova:
2x-4y=36
 2(14)-4(-2) = 36
28 + 8 = 36
36 = 36
 
x+4y=6
14 + 4(-2)=6
14 - 8 = 6
6 = 6
Portanto x=14 e y=-2