Jesus, Son of God, equal to God
1. First born was used as a means of denoting authority. In the Old Test, prophets were accorded the term "first born" of a particular father "Jacob was first born of Isaac". Even when they were not the 'literal 1st born'. Why? Jesus was "FIRST BORN OF ALL CREATION" . This is significantly different than the terms used by and of prophets. The scripture gives Jesus AUTHORITY OVER ALL CREATION. That is the manner of interpretation of that phrase.
2. Jesus is Son of God. There are different meaning to that term from Old test to New test. In the New Test, we see that mankind is "ADOPTED INTO SONSHIP" while Jesus was the "ONLY BEGOTTEN SON OF GOD".
What does it mean to be "begotten"? Well, like begets like...you beget a human but create a robot. God begets God, who had no beginning ,and always was...Jesus uses the term Son of God in a relational, not literal term. He is made of the SAME STUFF as God...just as your children are made of the SAME STUFF as you.
3. Many verses demonstate that Jesus was God incarnate...willingly shedding the God mantle as a sacrafice for our sins. Old testament clearly predicts Gods coming in human form (Isaiah 9) Muslims just cannot believe that due to the brain washing received in there education ...that unfortunately is a symptom of the deceipt of the evil one.