Earrings Sold by Alex

Two friends, Alex and Jordan, are selling handmade jewelry at a local market. Alex sells necklaces for $12 each and earrings for $8 each. Jordan sells bracelets for $15 each and necklaces for $10 each. After a particularly good day at the market, the total sales amount was $192. If Alex sold twice as many necklaces as earrings, and Jordan sold three more necklaces than bracelets, how many earrings did Alex sell?