9-u=-10u-9

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Solution for 9-u=-10u-9 equation:


Simplifying
9 + -1u = -10u + -9

Reorder the terms:
9 + -1u = -9 + -10u

Solving
9 + -1u = -9 + -10u

Solving for variable 'u'.

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

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

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

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

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

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

Combine like terms: -9 + -9 = -18
9u = -18

Divide each side by '9'.
u = -2

Simplifying
u = -2

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