If a permanent has multiple equip abilities, any of its equip abilities may be activated.
May 3, 2019 · War of the Spark
An “equip [quality] creature” ability is an equip ability, and an “equip [quality] creature” cost is an equip cost. Any effect that modifies how or whether a player may activate an equip ability of an object affects “equip [quality] creature” abilities of that object. Any effect that increases or reduces an equip cost will increase or reduce a “equip [quality] creature” cost.
January 25, 2019 · Ravnica Allegiance
An "equip [quality] creature" ability is an equip ability, and an "equip [quality] creature" cost is an equip cost. Any effect that modifies how or whether a player may activate an equip ability of an object affects "equip [quality] creature" abilities of that object. Any effect that increases or reduces an equip cost will increase or reduce a "equip [quality] creature" cost.
April 27, 2018 · Dominaria
An “equip [quality] creature” ability is an equip ability, and an “equip [quality] creature” cost is an equip cost. Any effect that modifies how or whether a player may activate an equip ability of an object affects “equip [quality] creature” abilities of that object. Any effect that increases or reduces an equip cost will increase or reduce a “equip [quality] creature” cost.