261=81-u

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Solution for 261=81-u equation:


Simplifying
261 = 81 + -1u

Solving
261 = 81 + -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.
261 + u = 81 + -1u + u

Combine like terms: -1u + u = 0
261 + u = 81 + 0
261 + u = 81

Add '-261' to each side of the equation.
261 + -261 + u = 81 + -261

Combine like terms: 261 + -261 = 0
0 + u = 81 + -261
u = 81 + -261

Combine like terms: 81 + -261 = -180
u = -180

Simplifying
u = -180

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