Question

a 120 page book has p lines to a page. if the number of lines were reduced by 3 on each page the number of pages would need to be increased by 20 to give the same amount of writing space. how many lines were there on the page originally?? pls help <3

Answer 1

Answer: 21

Explanation:

Space on book with p lines per page

= 120p

Amount of space needed to give the same space as initial

= 140(p - 3)

= 140p - 420

Hence we can form the equation:

140p - 420 = 120p

20p = 420

p = 21