A*B-C=15

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Solution for A*B-C=15 equation: 


Simplifying
A * B + -1C = 15

Multiply A * B
AB + -1C = 15

Solving
AB + -1C = 15

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 = 15 + C

Combine like terms: -1C + C = 0
AB + 0 = 15 + C
AB = 15 + C

Divide each side by 'B'.
A = 15B-1 + B-1C

Simplifying
A = 15B-1 + B-1C

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