X+(-0.9)=-3.9

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Solution for X+(-0.9)=-3.9 equation: 


Simplifying
X + (-0.9) = -3.9
X + -0.9 = -3.9

Reorder the terms:
-0.9 + X = -3.9

Solving
-0.9 + X = -3.9

Solving for variable 'X'.

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

Add '0.9' to each side of the equation.
-0.9 + 0.9 + X = -3.9 + 0.9

Combine like terms: -0.9 + 0.9 = 0.0
0.0 + X = -3.9 + 0.9
X = -3.9 + 0.9

Combine like terms: -3.9 + 0.9 = -3
X = -3

Simplifying
X = -3

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