f(x)=cosx+4x

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Solution for f(x)=cosx+4x equation: 


Simplifying
f(x) = cosx + 4x

Multiply f * x
fx = cosx + 4x

Solving
fx = cosx + 4x

Solving for variable 'f'.

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

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

Simplifying
f = cos + 4

Reorder the terms:
f = 4 + cos

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