X+x-3x=-40

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Solution for X+x-3x=-40 equation: 


Simplifying
X + x + -3x = -40

Combine like terms: x + -3x = -2x
X + -2x = -40

Solving
X + -2x = -40

Solving for variable 'X'.

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

Add '2x' to each side of the equation.
X + -2x + 2x = -40 + 2x

Combine like terms: -2x + 2x = 0
X + 0 = -40 + 2x
X = -40 + 2x

Simplifying
X = -40 + 2x

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