225=135-u

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Solution for 225=135-u equation:


Simplifying
225 = 135 + -1u

Solving
225 = 135 + -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.
225 + u = 135 + -1u + u

Combine like terms: -1u + u = 0
225 + u = 135 + 0
225 + u = 135

Add '-225' to each side of the equation.
225 + -225 + u = 135 + -225

Combine like terms: 225 + -225 = 0
0 + u = 135 + -225
u = 135 + -225

Combine like terms: 135 + -225 = -90
u = -90

Simplifying
u = -90

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