1. Problem statement: Find the missing terms A, B, and C in the expressions involving sums of terms with the variable $p$. 2. Given expressions: - $p + 4p + 5p$ - Intermediate sums: - $A = p + 4p$ - $B = 4p + 5p$ - Final sum: - $C = A + B$ 3. Calculate $A$: $$A = p + 4p = 5p$$ 4. Calculate $B$: $$B = 4p + 5p = 9p$$ 5. Calculate $C$: $$C = A + B = 5p + 9p = 14p$$ 6. Final answers: - $A = 5p$ - $B = 9p$ - $C = 14p$