3.9+0.5x=0.4

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Solution for 3.9+0.5x=0.4 equation: 


Simplifying
3.9 + 0.5x = 0.4

Solving
3.9 + 0.5x = 0.4

Solving for variable 'x'.

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

Add '-3.9' to each side of the equation.
3.9 + -3.9 + 0.5x = 0.4 + -3.9

Combine like terms: 3.9 + -3.9 = 0.0
0.0 + 0.5x = 0.4 + -3.9
0.5x = 0.4 + -3.9

Combine like terms: 0.4 + -3.9 = -3.5
0.5x = -3.5

Divide each side by '0.5'.
x = -7

Simplifying
x = -7

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