9=kn+4f

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Solution for 9=kn+4f equation:


Simplifying
9 = kn + 4f

Reorder the terms:
9 = 4f + kn

Solving
9 = 4f + kn

Solving for variable 'f'.

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

Add '-4f' to each side of the equation.
9 + -4f = 4f + -4f + kn

Combine like terms: 4f + -4f = 0
9 + -4f = 0 + kn
9 + -4f = kn

Add '-9' to each side of the equation.
9 + -9 + -4f = -9 + kn

Combine like terms: 9 + -9 = 0
0 + -4f = -9 + kn
-4f = -9 + kn

Divide each side by '-4'.
f = 2.25 + -0.25kn

Simplifying
f = 2.25 + -0.25kn

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