3+u=-9

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Solution for 3+u=-9 equation: 


Simplifying
3 + u = -9

Solving
3 + u = -9

Solving for variable 'u'.

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

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

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

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

Simplifying
u = -12

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