Answer:
The number of pages Gillian wrote on the third day is
pages
Explanation:
Given
Number of days = 3 days
Pages of report = 10 pages
First day = 3½ pages
Second day = 4⅓ pages
Required
Number of pages written on the third day.
Let the number of pages written on the first, second and the third day be represented with F, S and T respectively.
So,
F = 3½ pages
S = 4⅓ pages
From the given data, we have that the report was 10 pages.
Hence,
F + S + T = 10 pages
F + S + T = 10
By substitution, we have
3½ + 4⅓ + T = 10
Convert mixed fractions to equivalent improper fraction.

Add fractions


Make T the subject of formula

Subtract



Recall that T represent number of pages written on the third day.
Hence, the number of pages Gillian wrote on the third day is
pages