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

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Solution for -9d+d+3d+d=12 equation: 


Simplifying
-9d + d + 3d + d = 12

Combine like terms: -9d + d = -8d
-8d + 3d + d = 12

Combine like terms: -8d + 3d = -5d
-5d + d = 12

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

Solving
-4d = 12

Solving for variable 'd'.

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

Divide each side by '-4'.
d = -3

Simplifying
d = -3

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