f(x)=3-cosx

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Solution for f(x)=3-cosx equation: 


Simplifying
f(x) = 3 + -1cosx

Multiply f * x
fx = 3 + -1cosx

Solving
fx = 3 + -1cosx

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Divide each side by 'x'.
f = 3x-1 + -1cos

Simplifying
f = 3x-1 + -1cos

Reorder the terms:
f = -1cos + 3x-1

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