x-2.1=4.2

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Solution for x-2.1=4.2 equation: 


Simplifying
x + -2.1 = 4.2

Reorder the terms:
-2.1 + x = 4.2

Solving
-2.1 + x = 4.2

Solving for variable 'x'.

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

Add '2.1' to each side of the equation.
-2.1 + 2.1 + x = 4.2 + 2.1

Combine like terms: -2.1 + 2.1 = 0.0
0.0 + x = 4.2 + 2.1
x = 4.2 + 2.1

Combine like terms: 4.2 + 2.1 = 6.3
x = 6.3

Simplifying
x = 6.3

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