3-d=-d-9+4d

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


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

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

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

Solving
3 + -1d = -9 + 3d

Solving for variable 'd'.

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

Add '-3d' to each side of the equation.
3 + -1d + -3d = -9 + 3d + -3d

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

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

Add '-3' to each side of the equation.
3 + -3 + -4d = -9 + -3

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

Combine like terms: -9 + -3 = -12
-4d = -12

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

Simplifying
d = 3

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