Question: Modular Math: Solving a linear congruence

I am attempting to solve the following problem with maple:

 

3 ∙ x ≡ 1 (mod(2))

Yet when entering this into maple I get the following error:

Error, invalid input: modp expects 2 arguments, but received 1

So how would one enter this problem into maple?  What other argument would need to be entered or can maple even solve this?

 

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