Lanaiya sold half of her comic books and then bought 9 more. If she now has 81 comic books, how many comic books did she begin with? Use the space below to write and solve an equation to answer word problem. Place your final, labeled answer in the box.

144

Step-by-step explanation:

(81 - 9) * 2 = 144

work backwards, you now have 81 books. But you bought 9, so pretend you didn't buy the 9, means you would have 9 less books. so 81-9.

Then you multiply by 2 because originally you sold half of the books, so before you sold half, you had double the amount, so you multiply that by 2.

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step-by-step explanation: