12.8=3.2d

Solution for 12.8=3.2d equation:

Simplifying
12.8 = 3.2d

Solving
12.8 = 3.2d

Solving for variable 'd'.

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

Add '-3.2d' to each side of the equation.
12.8 + -3.2d = 3.2d + -3.2d

Combine like terms: 3.2d + -3.2d = 0.0
12.8 + -3.2d = 0.0

Add '-12.8' to each side of the equation.
12.8 + -12.8 + -3.2d = 0.0 + -12.8

Combine like terms: 12.8 + -12.8 = 0.0
0.0 + -3.2d = 0.0 + -12.8
-3.2d = 0.0 + -12.8

Combine like terms: 0.0 + -12.8 = -12.8
-3.2d = -12.8

Divide each side by '-3.2'.
d = 4

Simplifying
d = 4