21.6-d=-5d

Solution for 21.6-d=-5d equation:

Simplifying
21.6 + -1d = -5d

Solving
21.6 + -1d = -5d

Solving for variable 'd'.

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

Add '5d' to each side of the equation.
21.6 + -1d + 5d = -5d + 5d

Combine like terms: -1d + 5d = 4d
21.6 + 4d = -5d + 5d

Combine like terms: -5d + 5d = 0
21.6 + 4d = 0

Add '-21.6' to each side of the equation.
21.6 + -21.6 + 4d = 0 + -21.6

Combine like terms: 21.6 + -21.6 = 0.0
0.0 + 4d = 0 + -21.6
4d = 0 + -21.6

Combine like terms: 0 + -21.6 = -21.6
4d = -21.6

Divide each side by '4'.
d = -5.4

Simplifying
d = -5.4