The main problem I am having with these is that when I replace one variable with another variable, I introduce other variables, values for which I cannot solve! The links to the images are below.
https://scrn.li/2J5l5X0cX7z1Y7
https://scrn.li/XrAH6lKvW7Zf6x
https://scrn.li/xGjxwh2PC8As31
https://scrn.li/2J5l5X0cX7z1Y7
https://scrn.li/XrAH6lKvW7Zf6x
https://scrn.li/xGjxwh2PC8As31
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