[tex]Sum =[/tex] [tex]add (+)[/tex]
[tex]Twelve =[/tex] [tex]12[/tex]
[tex]p[/tex] & [tex]d = [/tex] [tex]p[/tex] & [tex]d[/tex] (since they are unknown numbers)
SO, this means that your answer SHOULD look like this: [tex]12p[/tex] [tex]+ d[/tex]
Good luck on your assignment and enjoy your day!
~[tex]LoveYourselfFirst:)[/tex]