(adsbygoogle = window.adsbygoogle || []).push({}); 2 way equation??!! (which is right?)

I'm used to the formula(for converting celcius in to farenhiet):

c=f+ 30 x 2. BUT, in some book (call it book B), its different. You just use F= 9/5 (C-32) and replace C with the given celcius temprature and multiply every thing by 9/5. Anyhow, I used both formulas, and got 2 different answers (and checked my work). Personally, I think the way book B put it doesn't make sense. If it makes sense to you, please explain.

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# 2 way equation? (which is right?)

**Physics Forums | Science Articles, Homework Help, Discussion**