0.4(8-0.2m)=-4

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Solution for 0.4(8-0.2m)=-4 equation: 


Simplifying
0.4(8 + -0.2m) = -4
(8 * 0.4 + -0.2m * 0.4) = -4
(3.2 + -0.08m) = -4

Solving
3.2 + -0.08m = -4

Solving for variable 'm'.

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

Add '-3.2' to each side of the equation.
3.2 + -3.2 + -0.08m = -4 + -3.2

Combine like terms: 3.2 + -3.2 = 0.0
0.0 + -0.08m = -4 + -3.2
-0.08m = -4 + -3.2

Combine like terms: -4 + -3.2 = -7.2
-0.08m = -7.2

Divide each side by '-0.08'.
m = 90

Simplifying
m = 90

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