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# Trying to find d watch

1. When u subtract one Sn formula from a second Sn formula
36.75 = 10t+ 45 d
minus 18.75 = 6t+15 d
2. (Original post by B J Smith)
When u subtract one Sn formula from a second Sn formula
36.75 = 10t+ 45 d
minus 18.75 = 6t+15 d
Subtract the LHS and RHS individually and end up with a single equation. Though that's useless if you're trying to find d without scaling the two to get the same coefficient of t.
3. Am I the only one who read this and began to unzip their trousers?

No? Okay...
4. d= 11/40 t=39/16
not entirely sure, but this is what i got.

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