f(x)=-7-6cos(-5x)

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Solution for f(x)=-7-6cos(-5x) equation: 


Simplifying
f(x) = -7 + -6cos(-5x)

Multiply f * x
fx = -7 + -6cos(-5x)

Remove parenthesis around (-5x)
fx = -7 + -6cos * -5x

Reorder the terms for easier multiplication:
fx = -7 + -6 * -5cos * x

Multiply -6 * -5
fx = -7 + 30cos * x

Multiply cos * x
fx = -7 + 30cosx

Solving
fx = -7 + 30cosx

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -7x-1 + 30cos

Simplifying
f = -7x-1 + 30cos

Reorder the terms:
f = 30cos + -7x-1

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