9=3+-3d

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Solution for 9=3+-3d equation:


Simplifying
9 = 3 + -3d

Solving
9 = 3 + -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.
9 + 3d = 3 + -3d + 3d

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

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

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

Combine like terms: 3 + -9 = -6
3d = -6

Divide each side by '3'.
d = -2

Simplifying
d = -2

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