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Christina has been busy planning a barbecue for her older brother's high school graduation. She invited $13$ relatives from her mother's side of the family. The rest of the relatives she invited are from her father's side of the family. She invited a total of $58$ relatives.$\newline$Let $f$ represent the number of relatives Christina invited from her father's side. Which equation models the problem?$\newline$Choices:$\newline$(A) $f + 13 = 58$$\newline$(B) $f - 13 = 58$$\newline$Solve this equation to find the number of relatives Christina invited from her father's side.$\newline$____ relatives$\newline$