Ax+fy=k

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Solution for Ax+fy=k equation: 


Simplifying
Ax + fy = k

Reorder the terms:
fy + xA = k

Solving
fy + xA = k

Solving for variable 'f'.

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

Add '-1xA' to each side of the equation.
fy + xA + -1xA = k + -1xA

Combine like terms: xA + -1xA = 0
fy + 0 = k + -1xA
fy = k + -1xA

Divide each side by 'y'.
f = ky-1 + -1xy-1A

Simplifying
f = ky-1 + -1xy-1A

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