3d-4+d=16

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Solution for 3d-4+d=16 equation: 


Simplifying
3d + -4 + d = 16

Reorder the terms:
-4 + 3d + d = 16

Combine like terms: 3d + d = 4d
-4 + 4d = 16

Solving
-4 + 4d = 16

Solving for variable 'd'.

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

Add '4' to each side of the equation.
-4 + 4 + 4d = 16 + 4

Combine like terms: -4 + 4 = 0
0 + 4d = 16 + 4
4d = 16 + 4

Combine like terms: 16 + 4 = 20
4d = 20

Divide each side by '4'.
d = 5

Simplifying
d = 5

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