X+X=-40

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Solution for X+X=-40 equation: 


Simplifying
X + X = -40

Combine like terms: X + X = 2X
2X = -40

Solving
2X = -40

Solving for variable 'X'.

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

Divide each side by '2'.
X = -20

Simplifying
X = -20

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