3.2=0.4n

Solution for 3.2=0.4n equation:

Simplifying
3.2 = 0.4n

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