X+.5x=21

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Solution for X+.5x=21 equation: 


Simplifying
X + 0.5x = 21

Solving
X + 0.5x = 21

Solving for variable 'X'.

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

Add '-0.5x' to each side of the equation.
X + 0.5x + -0.5x = 21 + -0.5x

Combine like terms: 0.5x + -0.5x = 0.0
X + 0.0 = 21 + -0.5x
X = 21 + -0.5x

Simplifying
X = 21 + -0.5x

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