-1=-9+2u

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Solution for -1=-9+2u equation:


Simplifying
-1 = -9 + 2u

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

Combine like terms: 2u + -2u = 0
-1 + -2u = -9 + 0
-1 + -2u = -9

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

Combine like terms: -1 + 1 = 0
0 + -2u = -9 + 1
-2u = -9 + 1

Combine like terms: -9 + 1 = -8
-2u = -8

Divide each side by '-2'.
u = 4

Simplifying
u = 4

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