6=-d+18

Solution for 6=-d+18 equation:

Simplifying
6 = -1d + 18

Reorder the terms:
6 = 18 + -1d

Solving
6 = 18 + -1d

Solving for variable 'd'.

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

Add 'd' to each side of the equation.
6 + d = 18 + -1d + d

Combine like terms: -1d + d = 0
6 + d = 18 + 0
6 + d = 18

Add '-6' to each side of the equation.
6 + -6 + d = 18 + -6

Combine like terms: 6 + -6 = 0
0 + d = 18 + -6
d = 18 + -6

Combine like terms: 18 + -6 = 12
d = 12

Simplifying
d = 12