ab-c=d

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Solution for ab-c=d equation: 


Simplifying
ab + -1c = d

Solving
ab + -1c = d

Solving for variable 'a'.

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

Add 'c' to each side of the equation.
ab + -1c + c = c + d

Combine like terms: -1c + c = 0
ab + 0 = c + d
ab = c + d

Divide each side by 'b'.
a = b-1c + b-1d

Simplifying
a = b-1c + b-1d

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