-4(0.1x+0.2)-0.9=-0.5

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Solution for -4(0.1x+0.2)-0.9=-0.5 equation: 


Simplifying
-4(0.1x + 0.2) + -0.9 = -0.5

Reorder the terms:
-4(0.2 + 0.1x) + -0.9 = -0.5
(0.2 * -4 + 0.1x * -4) + -0.9 = -0.5
(-0.8 + -0.4x) + -0.9 = -0.5

Reorder the terms:
-0.8 + -0.9 + -0.4x = -0.5

Combine like terms: -0.8 + -0.9 = -1.7
-1.7 + -0.4x = -0.5

Solving
-1.7 + -0.4x = -0.5

Solving for variable 'x'.

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

Add '1.7' to each side of the equation.
-1.7 + 1.7 + -0.4x = -0.5 + 1.7

Combine like terms: -1.7 + 1.7 = 0.0
0.0 + -0.4x = -0.5 + 1.7
-0.4x = -0.5 + 1.7

Combine like terms: -0.5 + 1.7 = 1.2
-0.4x = 1.2

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

Simplifying
x = -3

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