100=-x

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Solution for 100=-x equation: 


Simplifying
100 = -1x

Solving
100 = -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
100 + x = -1x + x

Combine like terms: -1x + x = 0
100 + x = 0

Add '-100' to each side of the equation.
100 + -100 + x = 0 + -100

Combine like terms: 100 + -100 = 0
0 + x = 0 + -100
x = 0 + -100

Combine like terms: 0 + -100 = -100
x = -100

Simplifying
x = -100

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