Respuesta:
y=-1
Explicación paso a paso:
y-1=2y
y-1+1=2y+1
y=2y+1
y-2y=2y+1-2y
-y=1
-y/-1=1/-1
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Respuesta:
y=-1
Explicación paso a paso:
y-1=2y
y-1+1=2y+1
y=2y+1
y-2y=2y+1-2y
-y=1
-y/-1=1/-1
y=-1