9=-6+u

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Solution for 9=-6+u equation: 


Simplifying
9 = -6 + u

Solving
9 = -6 + u

Solving for variable 'u'.

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

Add '-1u' to each side of the equation.
9 + -1u = -6 + u + -1u

Combine like terms: u + -1u = 0
9 + -1u = -6 + 0
9 + -1u = -6

Add '-9' to each side of the equation.
9 + -9 + -1u = -6 + -9

Combine like terms: 9 + -9 = 0
0 + -1u = -6 + -9
-1u = -6 + -9

Combine like terms: -6 + -9 = -15
-1u = -15

Divide each side by '-1'.
u = 15

Simplifying
u = 15

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