3.2=(-0.4)n

Solution for 3.2=(-0.4)n equation:

Simplifying
3.2 = (-0.4) * n

Solving
3.2 = -0.4n

Solving for variable 'n'.

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

Add '0.4n' to each side of the equation.
3.2 + 0.4n = -0.4n + 0.4n

Combine like terms: -0.4n + 0.4n = 0.0
3.2 + 0.4n = 0.0

Add '-3.2' to each side of the equation.
3.2 + -3.2 + 0.4n = 0.0 + -3.2

Combine like terms: 3.2 + -3.2 = 0.0
0.0 + 0.4n = 0.0 + -3.2
0.4n = 0.0 + -3.2

Combine like terms: 0.0 + -3.2 = -3.2
0.4n = -3.2

Divide each side by '0.4'.
n = -8

Simplifying
n = -8