ab-c=R

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Solution for ab-c=R equation: 


Simplifying
ab + -1c = R

Solving
ab + -1c = R

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 = R + c

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

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

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

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