3d-4-d+9=

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Solution for 3d-4-d+9= equation:


Simplifying
3d + -4 + -1d + 9 = 0

Reorder the terms:
-4 + 9 + 3d + -1d = 0

Combine like terms: -4 + 9 = 5
5 + 3d + -1d = 0

Combine like terms: 3d + -1d = 2d
5 + 2d = 0

Solving
5 + 2d = 0

Solving for variable 'd'.

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

Add '-5' to each side of the equation.
5 + -5 + 2d = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 2d = 0 + -5
2d = 0 + -5

Combine like terms: 0 + -5 = -5
2d = -5

Divide each side by '2'.
d = -2.5

Simplifying
d = -2.5

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