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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