6+3(D-1)=1

Solution for 6+3(D-1)=1 equation:

Simplifying
6 + 3(D + -1) = 1

Reorder the terms:
6 + 3(-1 + D) = 1
6 + (-1 * 3 + D * 3) = 1
6 + (-3 + 3D) = 1

Combine like terms: 6 + -3 = 3
3 + 3D = 1

Solving
3 + 3D = 1

Solving for variable 'D'.

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

Add '-3' to each side of the equation.
3 + -3 + 3D = 1 + -3

Combine like terms: 3 + -3 = 0
0 + 3D = 1 + -3
3D = 1 + -3

Combine like terms: 1 + -3 = -2
3D = -2

Divide each side by '3'.
D = -0.6666666667

Simplifying
D = -0.6666666667