-u-9=2u+9

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Solution for -u-9=2u+9 equation:


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

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

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

Solving
-9 + -1u = 9 + 2u

Solving for variable 'u'.

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

Add '-2u' to each side of the equation.
-9 + -1u + -2u = 9 + 2u + -2u

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

Combine like terms: 2u + -2u = 0
-9 + -3u = 9 + 0
-9 + -3u = 9

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

Combine like terms: -9 + 9 = 0
0 + -3u = 9 + 9
-3u = 9 + 9

Combine like terms: 9 + 9 = 18
-3u = 18

Divide each side by '-3'.
u = -6

Simplifying
u = -6

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