Mathematics, 25.05.2021 16:40 hhh4775

I need a bit of help please, I already tried working out the problem, but I got it wrong, so I think I did something wrong but I'm not sure where I did it. Can someone help?

I need a bit of help please, I already tried working out the problem, but I got it wrong, so I thin

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I need a bit of help please, I already tried working out the problem, but I got it wrong, so I think...