0.4-2x=-0.8

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Solution for 0.4-2x=-0.8 equation: 


Simplifying
0.4 + -2x = -0.8

Solving
0.4 + -2x = -0.8

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 + -2x = -0.8 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + -2x = -0.8 + -0.4
-2x = -0.8 + -0.4

Combine like terms: -0.8 + -0.4 = -1.2
-2x = -1.2

Divide each side by '-2'.
x = 0.6

Simplifying
x = 0.6

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