So when i use the following command, I get the following error(adsbygoogle = window.adsbygoogle || []).push({});

DSolve[y'[x] - y[x] == 3, y[x], x]

DSolve::deqn: Equation or list of equations expected instead of False in the first argument False. >>

But when i change the variable y[x] and y'[x] to s[x] and s'[x], It works

why is this?

In[185]:= DSolve[s'[x] - s[x] == 3, s[x], x]

Out[185]= {{s[x] -> -3 + E^x C[1]}}

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# Mathematica Mathematica being very strange

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