A+B-C=40

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Solution for A+B-C=40 equation:


Simplifying
A + B + -1C = 40

Solving
A + B + -1C = 40

Solving for variable 'A'.

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

Add '-1B' to each side of the equation.
A + B + -1B + -1C = 40 + -1B

Combine like terms: B + -1B = 0
A + 0 + -1C = 40 + -1B
A + -1C = 40 + -1B

Add 'C' to each side of the equation.
A + -1C + C = 40 + -1B + C

Combine like terms: -1C + C = 0
A + 0 = 40 + -1B + C
A = 40 + -1B + C

Simplifying
A = 40 + -1B + C

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