2x=100-x

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Solution for 2x=100-x equation: 


Simplifying
2x = 100 + -1x

Solving
2x = 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.
2x + x = 100 + -1x + x

Combine like terms: 2x + x = 3x
3x = 100 + -1x + x

Combine like terms: -1x + x = 0
3x = 100 + 0
3x = 100

Divide each side by '3'.
x = 33.33333333

Simplifying
x = 33.33333333

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