f(x)=4cosx-2x

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Solution for f(x)=4cosx-2x equation: 


Simplifying
f(x) = 4cosx + -2x

Multiply f * x
fx = 4cosx + -2x

Solving
fx = 4cosx + -2x

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 4cos + -2

Simplifying
f = 4cos + -2

Reorder the terms:
f = -2 + 4cos

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