55=45-u

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Solution for 55=45-u equation:


Simplifying
55 = 45 + -1u

Solving
55 = 45 + -1u

Solving for variable 'u'.

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

Add 'u' to each side of the equation.
55 + u = 45 + -1u + u

Combine like terms: -1u + u = 0
55 + u = 45 + 0
55 + u = 45

Add '-55' to each side of the equation.
55 + -55 + u = 45 + -55

Combine like terms: 55 + -55 = 0
0 + u = 45 + -55
u = 45 + -55

Combine like terms: 45 + -55 = -10
u = -10

Simplifying
u = -10

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