3u-12=9u

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Solution for 3u-12=9u equation:


Simplifying
3u + -12 = 9u

Reorder the terms:
-12 + 3u = 9u

Solving
-12 + 3u = 9u

Solving for variable 'u'.

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

Add '-9u' to each side of the equation.
-12 + 3u + -9u = 9u + -9u

Combine like terms: 3u + -9u = -6u
-12 + -6u = 9u + -9u

Combine like terms: 9u + -9u = 0
-12 + -6u = 0

Add '12' to each side of the equation.
-12 + 12 + -6u = 0 + 12

Combine like terms: -12 + 12 = 0
0 + -6u = 0 + 12
-6u = 0 + 12

Combine like terms: 0 + 12 = 12
-6u = 12

Divide each side by '-6'.
u = -2

Simplifying
u = -2

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