I added a few more things on a listening comprehension I find it difficult to simplify.I hope you can help me.

1) The House of Lords represented the aristocracy and the Church of England, whereas the House of Commons represented the merchants and the landed gentry.
2) The latter refused to pay taxes to finance the government policy unless their needs/interests were taken into account.
3) The conflict between the two houses was also religious because the interests of the mercantile classes were better suited to Puritanism than to the position of the official Anglican Church. (I need to clarify this sentence).
4) The reasons for the Puritans’ appeal to the mercantile classes can be summoned up as follows. (I’d like to clarify this sentence, too).
5) First, Puritan austerity fitted in well with the life-style of the mercantile classes, which made work rather than pleasure their main occupation.
6) The Puritan insistence on predestination, according to which (?) to have God on one’s side meant success (being successful) in one’s business, had a strong influence on the mercantile classes.
7) Lastly, the Puritan belief in individual conscience as sufficient for individual salvation (I need to simplify this) lead to the belief in unrestricted individualism in commercial matters, which formed the basis of the Industrial Revolution in the second half of the 18th century.

You need to simplify these? Say the same ideas but in fewer words?

1) The House of Lords represented the aristocracy and the Church of England, whereas the House of Commons represented merchants and landed gentry.

2) The latter refused to pay taxes to finance the government policy unless their needs were taken into account.

3) The mercantile classes were closer to Puritanism than to the position of the official Anglican Church; this produced the conflict between the two houses.

4) The reasons for the Puritans’ appeal to the mercantile classes can be explained as follows:

5) First, Puritan austerity fit in well with the lifestyle of the mercantile classes, for whom work rather than pleasure occupied most of their time.

6) In addition, the Puritan insistence on predestination, according to which having God on one’s side meant success in one’s business, had a strong influence on the mercantile classes.

7) Finally, the Puritan belief that individuals ultimately determine their own salvation led to the belief in unrestricted individualism in commercial matters. This fundamental belief formed the basis of the Industrial Revolution in the second half of the 18th century.

3) There/It was also a religious conflict, because the mercantile classes' interests were better suited to Puritanism than to that of tahe official Anmglican Church.

This IS clear.

6) The Puritan insistence on predestination, to have God on one's side, meant a successful business, thus having a strong influence on the mercantile classes.

Lastly, the Puritan belief in individual conscience for salvation...
Perhaps rather than "which formed" = forming?

Sra
4)

1) The House of Lords represented the upper class and the Church of England, while the House of Commons represented the businesspeople and the wealthy landowners.

To simplify this sentence, you could say:
The House of Lords represented the wealthy and the Church of England, while the House of Commons represented the businesspeople and landowners.

2) The latter refused to pay taxes to support the government's policies unless their needs and interests were taken into consideration.

To simplify this sentence, you could say:
The businesspeople and landowners refused to pay taxes unless their needs and interests were considered.

3) The conflict between the two houses was also religious in nature because the interests of the business class were better aligned with Puritanism rather than the official Anglican Church of England.

To simplify this sentence, you could say:
The conflict between the two houses was also based on religious differences, as the business class favored Puritanism over the official Anglican Church.

4) The reasons for the Puritans' appeal to the business class can be summarized as follows.

To simplify this sentence, you could say:
The reasons why the Puritans appealed to the business class can be summarized as follows.

5) First, the Puritan emphasis on simplicity and hard work resonated with the lifestyle of the business class, who prioritized work over leisure.

To simplify this sentence, you could say:
First, the Puritan focus on hard work aligned with the work-centric lifestyle of the business class.

6) The Puritan belief in predestination, which stated that success in business was a sign of God's favor, had a significant impact on the business class.

To simplify this sentence, you could say:
The Puritan belief in predestination, or the idea that success in business was a sign of God's favor, strongly influenced the business class.

7) Finally, the Puritan belief that an individual's conscience was enough for personal salvation contributed to an unrestricted individualistic approach to commerce. This belief formed the foundation of the Industrial Revolution in the second half of the 18th century.

To simplify this sentence, you could say:
Lastly, the Puritan belief that personal salvation relied on individual conscience led to an unrestricted individualistic approach to commerce, which laid the groundwork for the Industrial Revolution in the late 18th century.