1=9-4u

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Solution for 1=9-4u equation:


Simplifying
1 = 9 + -4u

Solving
1 = 9 + -4u

Solving for variable 'u'.

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

Add '4u' to each side of the equation.
1 + 4u = 9 + -4u + 4u

Combine like terms: -4u + 4u = 0
1 + 4u = 9 + 0
1 + 4u = 9

Add '-1' to each side of the equation.
1 + -1 + 4u = 9 + -1

Combine like terms: 1 + -1 = 0
0 + 4u = 9 + -1
4u = 9 + -1

Combine like terms: 9 + -1 = 8
4u = 8

Divide each side by '4'.
u = 2

Simplifying
u = 2

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