Answer:
for a book that have less than 100 pages, first publishing company is better choice, but for a book with more than 100 pages, second company is cheaper.
Explanation:
total pages=p
2p = p+100 -ยป p=100
FOR EXAMPLE:
for a book with 55 pages: first company cost 100$ and second company cost 155$
for a book with 300 pages: first company cost's 600$ but second company cost's 400$