a+b-c=d

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Solution for a+b-c=d equation:


Simplifying
a + b + -1c = d

Solving
a + b + -1c = d

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 = -1b + d

Combine like terms: b + -1b = 0
a + 0 + -1c = -1b + d
a + -1c = -1b + d

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

Combine like terms: -1c + c = 0
a + 0 = -1b + c + d
a = -1b + c + d

Simplifying
a = -1b + c + d

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