X-.4=20.6

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Solution for X-.4=20.6 equation: 


Simplifying
X + -0.4 = 20.6

Reorder the terms:
-0.4 + X = 20.6

Solving
-0.4 + X = 20.6

Solving for variable 'X'.

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

Add '0.4' to each side of the equation.
-0.4 + 0.4 + X = 20.6 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + X = 20.6 + 0.4
X = 20.6 + 0.4

Combine like terms: 20.6 + 0.4 = 21
X = 21

Simplifying
X = 21

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