Hey there!
[tex]\frac{7*3}{4}[/tex] [tex]=n[/tex]
Simplify the [tex]numerator[/tex] (the top part))
[tex]7*3 = 21[/tex]
Then, simplify the [tex]denominator[/tex] (the bottom part, let's pretend it is multiplied by a(n) invisible [tex]1[/tex] ))
[tex]4(1) = 4[/tex]
Our answer is: [tex]\boxed {n=\frac{21}{4} }[/tex]
Good luck on your assignment and enjoy your day!
~[tex]LoveYourselfFirst:)[/tex]