x+0.4=2.1

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Solution for x+0.4=2.1 equation: 


Simplifying
x + 0.4 = 2.1

Reorder the terms:
0.4 + x = 2.1

Solving
0.4 + x = 2.1

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 = 2.1 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + x = 2.1 + -0.4
x = 2.1 + -0.4

Combine like terms: 2.1 + -0.4 = 1.7
x = 1.7

Simplifying
x = 1.7

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