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Valentina is trying to decide whether to join her school's swim team. During the summer, the team practices $4$ days per week. Each of those days, they practice for $3$ hours in the morning and practice again in the afternoon. They practice for a total of $20$ hours each week.$\newline$Which equation can you use to find $h$, the length of each afternoon practice in hours?$\newline$Choices:$\newline$(A) $4h + 3 = 20$$\newline$(B) $3h + 4 = 20$$\newline$(C) $4(h + 3) = 20$$\newline$(D) $3(h + 4) = 20$$\newline$How long is each afternoon practice?$\newline$Write your answer as a whole number or a simplified fraction.$\newline$____ hours$\newline$