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Answer:
7.5
Step-by-step explanation:
The computation of the number of bookcases can she repaint is shown below:
[tex]= 3 \frac{3}{4} \div \frac{1}{2}\\\\= \frac{15}{4} \times 2\\\\= \frac{30}{4} \\\\= 7.5[/tex]
Hence, the 7.5 bookcases could be repainted