Yusuf Ali has:
29.45. Recite what is sent of the Book by inspiration to thee, and establish regular Prayer: for Prayer restrains from shameful and unjust deeds; and remembrance of Allah is the greatest (thing in life) without doubt. And Allah knows the (deeds) that ye do.
29.46. And dispute ye not with the People of the Book, except with means better (than mere disputation), unless it be with those of them who inflict wrong (and injury): but say, "We believe in the revelation which has come down to us and in that which came down to you; Our Allah and your Allah is one; and it is to Him we bow (in Islam)."
29.47. And thus (it is) that We have sent down the Book to thee. So the People of the Book believe therein, as also do some of these (pagan Arabs): and none but Unbelievers reject our signs.
29:45 says RECITE, singular to the Messenger who knew Arabic so understood what he read. This leads to ‘establishing’ salat which is linked to READING the Quran and REMEMBERING Allah as remembering Allah means knowing what He has revealed for you to READ.
29:46 says to debate with the people about what they are doing as NOW you have something better than them which you have READ in the REMEMBRANCE of Allah, the Quran. Tell them that we follow what we READ in the REVELATION. We FOLLOW what is revealed, we SUBMIT to this, we BOW IN ISLAM, which does not require a physical ritual but a WILLFUL act.
29:47 restates that we have to FOLLOW the Book and does not mention salat again as this has already been well expounded as meaning to be dutiful to Allah by following the Book.
Now we get:
Salaat = To follow closely, like a runner-up (Musalli) follows the winning horse (Saabiq) = To follow Divine Commands.
29:45 (O Prophet) convey to people all that is revealed to you of the Book, and establish the Divine System. Establishment of the Divine System will shut off lewdness, stinginess, and bad conduct. This is so, because God’s Law is the Greatest law that can give you eminence. And God knows whatever you people contrive on your own. [21:10, 21:24, 23:70, 43:43-44, 70:21-27. Fahasha includes miserliness, and Munkar is all behavior that goes against Permanent Values given in the Qur’an]
29:46 (The Divine System will be the Living truth in itself, so) argue not with the People of the Scripture except in a most kind manner. Tell those who adamantly relegate the truth, “We believe in what has been bestowed upon us, as well as (the truth in) what has been bestowed upon you. For, our God and your God is One, and to Him we surrender.” [2:79, 2:101, 3:78, 5:48. Zulm = To relegate the truth = Displace something from its rightful place = Oppression = Violation of human rights = Wrongdoing]
29:47 And thus it is! We have bestowed this Book upon you (O Prophet). And many of those whom We gave the previous Scriptures will come to believe in it (5:48). Also, many of your people will believe in it. And none could knowingly reject Our messages except such as would preemptively reject an obvious truth.