12d-9=18d+9

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Solution for 12d-9=18d+9 equation:


Simplifying
12d + -9 = 18d + 9

Reorder the terms:
-9 + 12d = 18d + 9

Reorder the terms:
-9 + 12d = 9 + 18d

Solving
-9 + 12d = 9 + 18d

Solving for variable 'd'.

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

Add '-18d' to each side of the equation.
-9 + 12d + -18d = 9 + 18d + -18d

Combine like terms: 12d + -18d = -6d
-9 + -6d = 9 + 18d + -18d

Combine like terms: 18d + -18d = 0
-9 + -6d = 9 + 0
-9 + -6d = 9

Add '9' to each side of the equation.
-9 + 9 + -6d = 9 + 9

Combine like terms: -9 + 9 = 0
0 + -6d = 9 + 9
-6d = 9 + 9

Combine like terms: 9 + 9 = 18
-6d = 18

Divide each side by '-6'.
d = -3

Simplifying
d = -3

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