14=13-u

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Solution for 14=13-u equation: 


Simplifying
14 = 13 + -1u

Solving
14 = 13 + -1u

Solving for variable 'u'.

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

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

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

Add '-14' to each side of the equation.
14 + -14 + u = 13 + -14

Combine like terms: 14 + -14 = 0
0 + u = 13 + -14
u = 13 + -14

Combine like terms: 13 + -14 = -1
u = -1

Simplifying
u = -1

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