9=3d-12

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Solution for 9=3d-12 equation:


Simplifying
9 = 3d + -12

Reorder the terms:
9 = -12 + 3d

Solving
9 = -12 + 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 + -3d = -12 + 3d + -3d

Combine like terms: 3d + -3d = 0
9 + -3d = -12 + 0
9 + -3d = -12

Add '-9' to each side of the equation.
9 + -9 + -3d = -12 + -9

Combine like terms: 9 + -9 = 0
0 + -3d = -12 + -9
-3d = -12 + -9

Combine like terms: -12 + -9 = -21
-3d = -21

Divide each side by '-3'.
d = 7

Simplifying
d = 7

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