39+-3D=-12

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Solution for 39+-3D=-12 equation: 


Simplifying
39 + -3D = -12

Solving
39 + -3D = -12

Solving for variable 'D'.

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

Add '-39' to each side of the equation.
39 + -39 + -3D = -12 + -39

Combine like terms: 39 + -39 = 0
0 + -3D = -12 + -39
-3D = -12 + -39

Combine like terms: -12 + -39 = -51
-3D = -51

Divide each side by '-3'.
D = 17

Simplifying
D = 17

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