X+-y=3

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Solution for X+-y=3 equation: 


Simplifying
X + -1y = 3

Solving
X + -1y = 3

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 = 3 + y

Combine like terms: -1y + y = 0
X + 0 = 3 + y
X = 3 + y

Simplifying
X = 3 + y

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