1-9u=-9+u

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


Simplifying
1 + -9u = -9 + u

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

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

Combine like terms: u + -1u = 0
1 + -10u = -9 + 0
1 + -10u = -9

Add '-1' to each side of the equation.
1 + -1 + -10u = -9 + -1

Combine like terms: 1 + -1 = 0
0 + -10u = -9 + -1
-10u = -9 + -1

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

Divide each side by '-10'.
u = 1

Simplifying
u = 1

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