6u+9=9u-18

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Solution for 6u+9=9u-18 equation:


Simplifying
6u + 9 = 9u + -18

Reorder the terms:
9 + 6u = 9u + -18

Reorder the terms:
9 + 6u = -18 + 9u

Solving
9 + 6u = -18 + 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.
9 + 6u + -9u = -18 + 9u + -9u

Combine like terms: 6u + -9u = -3u
9 + -3u = -18 + 9u + -9u

Combine like terms: 9u + -9u = 0
9 + -3u = -18 + 0
9 + -3u = -18

Add '-9' to each side of the equation.
9 + -9 + -3u = -18 + -9

Combine like terms: 9 + -9 = 0
0 + -3u = -18 + -9
-3u = -18 + -9

Combine like terms: -18 + -9 = -27
-3u = -27

Divide each side by '-3'.
u = 9

Simplifying
u = 9

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