-9d-6+7d=28

Solution for -9d-6+7d=28 equation:

Simplifying
-9d + -6 + 7d = 28

Reorder the terms:
-6 + -9d + 7d = 28

Combine like terms: -9d + 7d = -2d
-6 + -2d = 28

Solving
-6 + -2d = 28

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 + -2d = 28 + 6

Combine like terms: -6 + 6 = 0
0 + -2d = 28 + 6
-2d = 28 + 6

Combine like terms: 28 + 6 = 34
-2d = 34

Divide each side by '-2'.
d = -17

Simplifying
d = -17