X-y=a

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Solution for X-y=a equation: 


Simplifying
X + -1y = a

Solving
X + -1y = a

Solving for variable 'X'.

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

Add 'y' to each side of the equation.
X + -1y + y = a + y

Combine like terms: -1y + y = 0
X + 0 = a + y
X = a + y

Simplifying
X = a + y

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