9d-12=5d

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Solution for 9d-12=5d equation:


Simplifying
9d + -12 = 5d

Reorder the terms:
-12 + 9d = 5d

Solving
-12 + 9d = 5d

Solving for variable 'd'.

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

Add '-5d' to each side of the equation.
-12 + 9d + -5d = 5d + -5d

Combine like terms: 9d + -5d = 4d
-12 + 4d = 5d + -5d

Combine like terms: 5d + -5d = 0
-12 + 4d = 0

Add '12' to each side of the equation.
-12 + 12 + 4d = 0 + 12

Combine like terms: -12 + 12 = 0
0 + 4d = 0 + 12
4d = 0 + 12

Combine like terms: 0 + 12 = 12
4d = 12

Divide each side by '4'.
d = 3

Simplifying
d = 3

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