-4(0.2x+0.4)-2.1=-0.5

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Solution for -4(0.2x+0.4)-2.1=-0.5 equation: 


Simplifying
-4(0.2x + 0.4) + -2.1 = -0.5

Reorder the terms:
-4(0.4 + 0.2x) + -2.1 = -0.5
(0.4 * -4 + 0.2x * -4) + -2.1 = -0.5
(-1.6 + -0.8x) + -2.1 = -0.5

Reorder the terms:
-1.6 + -2.1 + -0.8x = -0.5

Combine like terms: -1.6 + -2.1 = -3.7
-3.7 + -0.8x = -0.5

Solving
-3.7 + -0.8x = -0.5

Solving for variable 'x'.

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

Add '3.7' to each side of the equation.
-3.7 + 3.7 + -0.8x = -0.5 + 3.7

Combine like terms: -3.7 + 3.7 = 0.0
0.0 + -0.8x = -0.5 + 3.7
-0.8x = -0.5 + 3.7

Combine like terms: -0.5 + 3.7 = 3.2
-0.8x = 3.2

Divide each side by '-0.8'.
x = -4

Simplifying
x = -4

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