6d-d+2d+6-4d=0

Solution for 6d-d+2d+6-4d=0 equation:

Simplifying
6d + -1d + 2d + 6 + -4d = 0

Reorder the terms:
6 + 6d + -1d + 2d + -4d = 0

Combine like terms: 6d + -1d = 5d
6 + 5d + 2d + -4d = 0

Combine like terms: 5d + 2d = 7d
6 + 7d + -4d = 0

Combine like terms: 7d + -4d = 3d
6 + 3d = 0

Solving
6 + 3d = 0

Solving for variable 'd'.

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

Add '-6' to each side of the equation.
6 + -6 + 3d = 0 + -6

Combine like terms: 6 + -6 = 0
0 + 3d = 0 + -6
3d = 0 + -6

Combine like terms: 0 + -6 = -6
3d = -6

Divide each side by '3'.
d = -2

Simplifying
d = -2