X+-9=12.42

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Solution for X+-9=12.42 equation: 


Simplifying
X + -9 = 12.42

Reorder the terms:
-9 + X = 12.42

Solving
-9 + X = 12.42

Solving for variable 'X'.

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

Add '9' to each side of the equation.
-9 + 9 + X = 12.42 + 9

Combine like terms: -9 + 9 = 0
0 + X = 12.42 + 9
X = 12.42 + 9

Combine like terms: 12.42 + 9 = 21.42
X = 21.42

Simplifying
X = 21.42

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