.5-x=20

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Solution for .5-x=20 equation: 


Simplifying
0.5 + -1x = 20

Solving
0.5 + -1x = 20

Solving for variable 'x'.

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

Add '-0.5' to each side of the equation.
0.5 + -0.5 + -1x = 20 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + -1x = 20 + -0.5
-1x = 20 + -0.5

Combine like terms: 20 + -0.5 = 19.5
-1x = 19.5

Divide each side by '-1'.
x = -19.5

Simplifying
x = -19.5

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