f(x)=4(5)

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


Simplifying
f(x) = 4(5)

Multiply f * x
fx = 4(5)

Multiply 4 * 5
fx = 20

Solving
fx = 20

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 20x-1

Simplifying
f = 20x-1

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