.5x-2.1=.4

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Solution for .5x-2.1=.4 equation: 


Simplifying
0.5x + -2.1 = 0.4

Reorder the terms:
-2.1 + 0.5x = 0.4

Solving
-2.1 + 0.5x = 0.4

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 + 0.5x = 0.4 + 2.1

Combine like terms: -2.1 + 2.1 = 0.0
0.0 + 0.5x = 0.4 + 2.1
0.5x = 0.4 + 2.1

Combine like terms: 0.4 + 2.1 = 2.5
0.5x = 2.5

Divide each side by '0.5'.
x = 5

Simplifying
x = 5

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