5=9-u

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Solution for 5=9-u equation:


Simplifying
5 = 9 + -1u

Solving
5 = 9 + -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.
5 + u = 9 + -1u + u

Combine like terms: -1u + u = 0
5 + u = 9 + 0
5 + u = 9

Add '-5' to each side of the equation.
5 + -5 + u = 9 + -5

Combine like terms: 5 + -5 = 0
0 + u = 9 + -5
u = 9 + -5

Combine like terms: 9 + -5 = 4
u = 4

Simplifying
u = 4

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