Given that Jen's tota run should be equal to 22 miles.
Let she ran 'x' miles on Friday. Then the sum of the number of miles for each day must be equal to 22 miles,
[tex]\begin{gathered} 4\frac{3}{4}+5\frac{1}{8}+0+6\frac{1}{4}+x=22 \\ \frac{19}{4}+\frac{41}{8}+\frac{25}{4}+x=22 \\ \frac{38+41+50}{8}+x=22 \\ \frac{129}{8}+x=22 \\ x=22-\frac{129}{8} \\ x=\frac{176-129}{8} \\ x=\frac{47}{8} \\ x=5\frac{7}{8} \end{gathered}[/tex]
Thus, she must run 5 whole 7/8 miles on Friday, in order to reach her goal.
