99=15+3u

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Solution for 99=15+3u equation:


Simplifying
99 = 15 + 3u

Solving
99 = 15 + 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.
99 + -3u = 15 + 3u + -3u

Combine like terms: 3u + -3u = 0
99 + -3u = 15 + 0
99 + -3u = 15

Add '-99' to each side of the equation.
99 + -99 + -3u = 15 + -99

Combine like terms: 99 + -99 = 0
0 + -3u = 15 + -99
-3u = 15 + -99

Combine like terms: 15 + -99 = -84
-3u = -84

Divide each side by '-3'.
u = 28

Simplifying
u = 28

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