f(x)=cost(4x+5)

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Solution for f(x)=cost(4x+5) equation: 


Simplifying
f(x) = cost(4x + 5)

Multiply f * x
fx = cost(4x + 5)

Reorder the terms:
fx = cost(5 + 4x)
fx = (5 * cost + 4x * cost)
fx = (5cost + 4costx)

Solving
fx = 5cost + 4costx

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 5costx-1 + 4cost

Simplifying
f = 5costx-1 + 4cost

Reorder the terms:
f = 4cost + 5costx-1

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