158=239-u

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Solution for 158=239-u equation:


Simplifying
158 = 239 + -1u

Solving
158 = 239 + -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.
158 + u = 239 + -1u + u

Combine like terms: -1u + u = 0
158 + u = 239 + 0
158 + u = 239

Add '-158' to each side of the equation.
158 + -158 + u = 239 + -158

Combine like terms: 158 + -158 = 0
0 + u = 239 + -158
u = 239 + -158

Combine like terms: 239 + -158 = 81
u = 81

Simplifying
u = 81

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