x-0.5y=21

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Solution for x-0.5y=21 equation: 


Simplifying
x + -0.5y = 21

Solving
x + -0.5y = 21

Solving for variable 'x'.

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

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

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

Simplifying
x = 21 + 0.5y

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