X-u=13

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Solution for X-u=13 equation: 


Simplifying
X + -1u = 13

Solving
X + -1u = 13

Solving for variable 'X'.

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

Add 'u' to each side of the equation.
X + -1u + u = 13 + u

Combine like terms: -1u + u = 0
X + 0 = 13 + u
X = 13 + u

Simplifying
X = 13 + u

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