Answer: 33 pages
Explanation:
Let x represent the total number of pages typed by Sharita.
The cost of the first 3 pages = $ 16
Each additional page cost $3
Total amount paid = $106
since the first 3 pages cost $16 , and x represent the total pages , then the remaining pages will be x - 3
Also , since each additional page cost $3 , the cost of the remaining pages will be 3 ( x - 3)
Combining this , we have
16 + 3 ( x -3 ) = 106
16 + 3x - 9 = 106
7 + 3x = 106
3x = 106 - 7
3x = 99
x = 33
therefore ,Sonia's paper was 33 pages long