12d-15=9d

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Solution for 12d-15=9d equation:


Simplifying
12d + -15 = 9d

Reorder the terms:
-15 + 12d = 9d

Solving
-15 + 12d = 9d

Solving for variable 'd'.

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

Add '-9d' to each side of the equation.
-15 + 12d + -9d = 9d + -9d

Combine like terms: 12d + -9d = 3d
-15 + 3d = 9d + -9d

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

Add '15' to each side of the equation.
-15 + 15 + 3d = 0 + 15

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

Combine like terms: 0 + 15 = 15
3d = 15

Divide each side by '3'.
d = 5

Simplifying
d = 5

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