Mock Set 1 Paper 01 Non Calculator

\[ \begin{array}{l} \text{Mano has three shelves of books.} \\ \text{There are } x \text{ books on shelf } \textbf{A}. \\ \text{There are } (3x + 1) \text{ books on shelf } \textbf{B}. \\ \text{There are } (2x - 5) \text{ books on shelf } \textbf{C}. \\ \rule{0pt}{0.5cm} \\ \text{There is a total of 44 books on the three shelves.} \\ \text{All the books have the same mass.} \\ \text{The books on shelf } \textbf{B} \text{ have a total mass of } 7500g. \\ \rule{0pt}{0.5cm} \\ \text{Work out the total mass of the books on shelf } \textbf{A}. \\ \text{Give your answer in grams.} \end{array} \]