x+-0.5x=-20

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Solution for x+-0.5x=-20 equation: 


Simplifying
x + -0.5x = -20

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

Solving
0.5x = -20

Solving for variable 'x'.

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

Divide each side by '0.5'.
x = -40

Simplifying
x = -40

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