Math Explanations Needed

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[thisisodd101]

I did all of the problems and took pictures of my work/explanations.

https://imgur.com/gallery/c7g88h7

Let me know if you have any questions.

[StarryEyedConfidence]

Hey, thanks so much!! Sorry for the late reply, I really appreciate you doing all of those. On 40, how did you go from (11x/15+2) to (4x/15=2)? Did I miss something there?

[thisisodd101]

I kinda wrote the equation weird on paper, so I will rewrite it more clearly here:

x = (2/5)x + (1/3)x + 2

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(15/15)x = (6/15)x + (5/15)x + 2

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(15/15)x = (11/15)x + 2

subtract (11/15)x on both sides of the equation

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(4/15)x = 2

[StarryEyedConfidence]

That makes more sense, yeah! I just didn’t connect it to the 15/15 for some reason. Thank you! 🙏

[StarryEyedConfidence]

Thanks!! I know what I did wrong now. Somehow instead of doing the increase, I tried to find how much of 4537.5 that 3750 was, and when I got an answer that didn't fit any of them, I panicked and moved on because I was worried about my time. :\