0.4x+0.9=-0.3

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Solution for 0.4x+0.9=-0.3 equation: 


Simplifying
0.4x + 0.9 = -0.3

Reorder the terms:
0.9 + 0.4x = -0.3

Solving
0.9 + 0.4x = -0.3

Solving for variable 'x'.

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

Add '-0.9' to each side of the equation.
0.9 + -0.9 + 0.4x = -0.3 + -0.9

Combine like terms: 0.9 + -0.9 = 0.0
0.0 + 0.4x = -0.3 + -0.9
0.4x = -0.3 + -0.9

Combine like terms: -0.3 + -0.9 = -1.2
0.4x = -1.2

Divide each side by '0.4'.
x = -3

Simplifying
x = -3

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