Mathematics, 16.09.2021 14:00 crystalhoff6176

I would like someone to please look at the attached image and tell me what I did wrong (no. 18) brainliest will be awarded to best answer.

I would like someone to please look at the attached image and tell me what I did wrong (no. 18) bra

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I would like someone to please look at the attached image and tell me what I did wrong (no. 18) brai...