Respuesta :
Answer:
20
Step-by-step explanation:
x/2+15=25
x/2=10
x=20
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Answer:20
Step-by-step explanation: after she sold half of her comics she bought 15 more which got 25. Now do 25-15 to get 10. 10 is half of her original amount, so multiply 10 by 2 to get 20 comic books