200=100-u

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Solution for 200=100-u equation:


Simplifying
200 = 100 + -1u

Solving
200 = 100 + -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.
200 + u = 100 + -1u + u

Combine like terms: -1u + u = 0
200 + u = 100 + 0
200 + u = 100

Add '-200' to each side of the equation.
200 + -200 + u = 100 + -200

Combine like terms: 200 + -200 = 0
0 + u = 100 + -200
u = 100 + -200

Combine like terms: 100 + -200 = -100
u = -100

Simplifying
u = -100

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