.6=.3d-12

Solution for .6=.3d-12 equation:

Simplifying
0.6 = 0.3d + -12

Reorder the terms:
0.6 = -12 + 0.3d

Solving
0.6 = -12 + 0.3d

Solving for variable 'd'.

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

Add '-0.3d' to each side of the equation.
0.6 + -0.3d = -12 + 0.3d + -0.3d

Combine like terms: 0.3d + -0.3d = 0.0
0.6 + -0.3d = -12 + 0.0
0.6 + -0.3d = -12

Add '-0.6' to each side of the equation.
0.6 + -0.6 + -0.3d = -12 + -0.6

Combine like terms: 0.6 + -0.6 = 0.0
0.0 + -0.3d = -12 + -0.6
-0.3d = -12 + -0.6

Combine like terms: -12 + -0.6 = -12.6
-0.3d = -12.6

Divide each side by '-0.3'.
d = 42

Simplifying
d = 42