21.6-9=5d

Solution for 21.6-9=5d equation:

Simplifying
21.6 + -9 = 5d

Combine like terms: 21.6 + -9 = 12.6
12.6 = 5d

Solving
12.6 = 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.
12.6 + -5d = 5d + -5d

Combine like terms: 5d + -5d = 0
12.6 + -5d = 0

Add '-12.6' to each side of the equation.
12.6 + -12.6 + -5d = 0 + -12.6

Combine like terms: 12.6 + -12.6 = 0.0
0.0 + -5d = 0 + -12.6
-5d = 0 + -12.6

Combine like terms: 0 + -12.6 = -12.6
-5d = -12.6

Divide each side by '-5'.
d = 2.52

Simplifying
d = 2.52