°2X+Y=-10 ° 5X=-30 ° COMPRUEBA
3X-Y=-20 X=-30/5 2(X)+Y=-10 3X-Y=-20
---------------- X=-6 2(-6)+(2)=-12+2 3(-6)-(+2)=-18-2
5X=-30 -10 -20
°REMPLAZA
2X+Y=-10 3X-Y=-20
2(-6)+Y=-10 3(-6)-Y=-20
-12+Y=-10 -18-Y=-20
-12+10=-Y -Y=-20+18
-2=-Y -Y=-2
Y=2 2=Y
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3 x - y = - 20
---------------------
5 x = - 30
x = - 30/5
x = - 6
2 x + y = - 10
2(- 6) + y = - 10
- 12 + y = - 10
y = - 10 + 12
y = 2
Respuesta
x = - 6 y = 2
COMPROBACIÓN
2 x + y = - 10 3 x - y = - 20
2 (- 6) + 2 = - 10 3(- 6) - 2 = - 20
- 12 + 2 = - 10 - 18 - 2 = - 20
- 10 = - 10 - 20 = - 20
°2X+Y=-10 ° 5X=-30 ° COMPRUEBA
3X-Y=-20 X=-30/5 2(X)+Y=-10 3X-Y=-20
---------------- X=-6 2(-6)+(2)=-12+2 3(-6)-(+2)=-18-2
5X=-30 -10 -20
°REMPLAZA
2X+Y=-10 3X-Y=-20
2(-6)+Y=-10 3(-6)-Y=-20
-12+Y=-10 -18-Y=-20
-12+10=-Y -Y=-20+18
-2=-Y -Y=-2
Y=2 2=Y