-4(0.1x+0.2)-2.1=-0.5

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Solution for -4(0.1x+0.2)-2.1=-0.5 equation: 


Simplifying
-4(0.1x + 0.2) + -2.1 = -0.5

Reorder the terms:
-4(0.2 + 0.1x) + -2.1 = -0.5
(0.2 * -4 + 0.1x * -4) + -2.1 = -0.5
(-0.8 + -0.4x) + -2.1 = -0.5

Reorder the terms:
-0.8 + -2.1 + -0.4x = -0.5

Combine like terms: -0.8 + -2.1 = -2.9
-2.9 + -0.4x = -0.5

Solving
-2.9 + -0.4x = -0.5

Solving for variable 'x'.

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

Add '2.9' to each side of the equation.
-2.9 + 2.9 + -0.4x = -0.5 + 2.9

Combine like terms: -2.9 + 2.9 = 0.0
0.0 + -0.4x = -0.5 + 2.9
-0.4x = -0.5 + 2.9

Combine like terms: -0.5 + 2.9 = 2.4
-0.4x = 2.4

Divide each side by '-0.4'.
x = -6

Simplifying
x = -6

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