6d-9-d=7-3d+8

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Solution for 6d-9-d=7-3d+8 equation:


Simplifying
6d + -9 + -1d = 7 + -3d + 8

Reorder the terms:
-9 + 6d + -1d = 7 + -3d + 8

Combine like terms: 6d + -1d = 5d
-9 + 5d = 7 + -3d + 8

Reorder the terms:
-9 + 5d = 7 + 8 + -3d

Combine like terms: 7 + 8 = 15
-9 + 5d = 15 + -3d

Solving
-9 + 5d = 15 + -3d

Solving for variable 'd'.

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

Add '3d' to each side of the equation.
-9 + 5d + 3d = 15 + -3d + 3d

Combine like terms: 5d + 3d = 8d
-9 + 8d = 15 + -3d + 3d

Combine like terms: -3d + 3d = 0
-9 + 8d = 15 + 0
-9 + 8d = 15

Add '9' to each side of the equation.
-9 + 9 + 8d = 15 + 9

Combine like terms: -9 + 9 = 0
0 + 8d = 15 + 9
8d = 15 + 9

Combine like terms: 15 + 9 = 24
8d = 24

Divide each side by '8'.
d = 3

Simplifying
d = 3

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