BACK+C=D

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Solution for BACK+C=D equation: 


Simplifying
BACK + C = D

Solving
ABCK + C = D

Solving for variable 'A'.

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

Add '-1C' to each side of the equation.
ABCK + C + -1C = -1C + D

Combine like terms: C + -1C = 0
ABCK + 0 = -1C + D
ABCK = -1C + D

Divide each side by 'BCK'.
A = -1B-1K-1 + B-1C-1DK-1

Simplifying
A = -1B-1K-1 + B-1C-1DK-1

Reorder the terms:
A = B-1C-1DK-1 + -1B-1K-1

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