x-0.4=42

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Solution for x-0.4=42 equation: 


Simplifying
x + -0.4 = 42

Reorder the terms:
-0.4 + x = 42

Solving
-0.4 + x = 42

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 = 42 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + x = 42 + 0.4
x = 42 + 0.4

Combine like terms: 42 + 0.4 = 42.4
x = 42.4

Simplifying
x = 42.4

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