XD+yF=K

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Solution for XD+yF=K equation: 


Simplifying
XD + yF = K

Solving
DX + yF = K

Solving for variable 'D'.

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

Add '-1yF' to each side of the equation.
DX + yF + -1yF = K + -1yF

Combine like terms: yF + -1yF = 0
DX + 0 = K + -1yF
DX = K + -1yF

Divide each side by 'X'.
D = KX-1 + -1yFX-1

Simplifying
D = KX-1 + -1yFX-1

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