Ab-cd=ef

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Solution for Ab-cd=ef equation: 


Simplifying
Ab + -1cd = ef

Solving
bA + -1cd = ef

Solving for variable 'b'.

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

Add 'cd' to each side of the equation.
bA + -1cd + cd = cd + ef

Combine like terms: -1cd + cd = 0
bA + 0 = cd + ef
bA = cd + ef

Divide each side by 'A'.
b = cdA-1 + efA-1

Simplifying
b = cdA-1 + efA-1

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