There are approximately 745 pages in main story
<em><u>Solution:</u></em>
Let "x" be the number of pages in main story
Let "y" be the number of pages in prologue
<em><u>Given that there are 750 pages in all</u></em>
Therefore,
number of pages in main story + number of pages in prologue = 750
x + y = 750 ---------- eqn 1
<em><u>The main story has 150 times as many pages as the prologue</u></em>
Therefore, a equation is framed as:
number of pages in main story = 150(number of pages in prologue)
x = 150y ----------- eqn 2
<em><u>Let us solve eqn 1 and eqn 2</u></em>
<em><u>Substitute eqn 2 in eqn 1</u></em>
150y + y = 750
151y = 750
y = 4.967
Substitute y = 4.967 in eqn 2
x = 150(4.967)
x = 745.05
Thus there are approximately 745 pages in main story