Answer:
14.
Step-by-step explanation:
For these types of questions, we will have to work backwards.
I have attached an image with this answer and I will explain it.
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She starts off with ?, and we divide 2, because she sold half of her comic books. Then, she buys 7 and she has 14.
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So, ? [tex]\div2[/tex]+7=14
We can work backwards,
so we will first subtract [tex]14-7=7[/tex] (Opposite of addition is subtraction)
And then [tex]7\times2=14[/tex] (Opposite of division is multiplication)
