9=-4u-1

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Solution for 9=-4u-1 equation:


Simplifying
9 = -4u + -1

Reorder the terms:
9 = -1 + -4u

Solving
9 = -1 + -4u

Solving for variable 'u'.

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

Add '4u' to each side of the equation.
9 + 4u = -1 + -4u + 4u

Combine like terms: -4u + 4u = 0
9 + 4u = -1 + 0
9 + 4u = -1

Add '-9' to each side of the equation.
9 + -9 + 4u = -1 + -9

Combine like terms: 9 + -9 = 0
0 + 4u = -1 + -9
4u = -1 + -9

Combine like terms: -1 + -9 = -10
4u = -10

Divide each side by '4'.
u = -2.5

Simplifying
u = -2.5

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