[tex]\bold{[ \ Answer \ ]}[/tex]
[tex]\boxed{\bold{F \ = \ -\frac{21}{19} }}[/tex]
[tex]\bold{[ \ Explanation \ ]}[/tex]
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[tex]\bold{-19f=21}[/tex]
[tex]\bold{\frac{-19f}{-19}=\frac{21}{-19}}[/tex]
[tex]\bold{F \ = \ -\frac{21}{19}}[/tex]
[tex]\boxed{\bold{[] \ Eclipsed \ []}}[/tex]
