166=255-u

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Solution for 166=255-u equation:


Simplifying
166 = 255 + -1u

Solving
166 = 255 + -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.
166 + u = 255 + -1u + u

Combine like terms: -1u + u = 0
166 + u = 255 + 0
166 + u = 255

Add '-166' to each side of the equation.
166 + -166 + u = 255 + -166

Combine like terms: 166 + -166 = 0
0 + u = 255 + -166
u = 255 + -166

Combine like terms: 255 + -166 = 89
u = 89

Simplifying
u = 89

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