3D+13=4

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Solution for 3D+13=4 equation: 


Simplifying
3D + 13 = 4

Reorder the terms:
13 + 3D = 4

Solving
13 + 3D = 4

Solving for variable 'D'.

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

Add '-13' to each side of the equation.
13 + -13 + 3D = 4 + -13

Combine like terms: 13 + -13 = 0
0 + 3D = 4 + -13
3D = 4 + -13

Combine like terms: 4 + -13 = -9
3D = -9

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

Simplifying
D = -3

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