12u-9u-1=2

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Solution for 12u-9u-1=2 equation: 


Simplifying
12u + -9u + -1 = 2

Reorder the terms:
-1 + 12u + -9u = 2

Combine like terms: 12u + -9u = 3u
-1 + 3u = 2

Solving
-1 + 3u = 2

Solving for variable 'u'.

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

Add '1' to each side of the equation.
-1 + 1 + 3u = 2 + 1

Combine like terms: -1 + 1 = 0
0 + 3u = 2 + 1
3u = 2 + 1

Combine like terms: 2 + 1 = 3
3u = 3

Divide each side by '3'.
u = 1

Simplifying
u = 1

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