0.04(5-0.4n)=-3.2

Solution for 0.04(5-0.4n)=-3.2 equation:

Simplifying
0.04(5 + -0.4n) = -3.2
(5 * 0.04 + -0.4n * 0.04) = -3.2
(0.2 + -0.016n) = -3.2

Solving
0.2 + -0.016n = -3.2

Solving for variable 'n'.

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

Add '-0.2' to each side of the equation.
0.2 + -0.2 + -0.016n = -3.2 + -0.2

Combine like terms: 0.2 + -0.2 = 0.0
0.0 + -0.016n = -3.2 + -0.2
-0.016n = -3.2 + -0.2

Combine like terms: -3.2 + -0.2 = -3.4
-0.016n = -3.4

Divide each side by '-0.016'.
n = 212.5

Simplifying
n = 212.5