10=u-9

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Solution for 10=u-9 equation:


Simplifying
10 = u + -9

Reorder the terms:
10 = -9 + u

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

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

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

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

Combine like terms: -9 + -10 = -19
-1u = -19

Divide each side by '-1'.
u = 19

Simplifying
u = 19

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