2.1x-0.4=3.8

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Solution for 2.1x-0.4=3.8 equation: 


Simplifying
2.1x + -0.4 = 3.8

Reorder the terms:
-0.4 + 2.1x = 3.8

Solving
-0.4 + 2.1x = 3.8

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 + 2.1x = 3.8 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + 2.1x = 3.8 + 0.4
2.1x = 3.8 + 0.4

Combine like terms: 3.8 + 0.4 = 4.2
2.1x = 4.2

Divide each side by '2.1'.
x = 2

Simplifying
x = 2

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