81=3u

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Solution for 81=3u equation:


Simplifying
81 = 3u

Solving
81 = 3u

Solving for variable 'u'.

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

Add '-3u' to each side of the equation.
81 + -3u = 3u + -3u

Combine like terms: 3u + -3u = 0
81 + -3u = 0

Add '-81' to each side of the equation.
81 + -81 + -3u = 0 + -81

Combine like terms: 81 + -81 = 0
0 + -3u = 0 + -81
-3u = 0 + -81

Combine like terms: 0 + -81 = -81
-3u = -81

Divide each side by '-3'.
u = 27

Simplifying
u = 27

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