Resolver método igualación:
3x + y = -1
x – y = 5
Indicar el valor de “y”
3x + y = -1
x – y = 5
Indicar el valor de “y”
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Respuesta:
7
Explicacion paso a paso:
3x + y = -1
x – y = 5 .(-3)
3x + y = -1
-3x – 3y = 15
-2y = 14
y= 14/2
y= 7