3d+9=2d-7

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Solution for 3d+9=2d-7 equation: 


Simplifying
3d + 9 = 2d + -7

Reorder the terms:
9 + 3d = 2d + -7

Reorder the terms:
9 + 3d = -7 + 2d

Solving
9 + 3d = -7 + 2d

Solving for variable 'd'.

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

Add '-2d' to each side of the equation.
9 + 3d + -2d = -7 + 2d + -2d

Combine like terms: 3d + -2d = 1d
9 + 1d = -7 + 2d + -2d

Combine like terms: 2d + -2d = 0
9 + 1d = -7 + 0
9 + 1d = -7

Add '-9' to each side of the equation.
9 + -9 + 1d = -7 + -9

Combine like terms: 9 + -9 = 0
0 + 1d = -7 + -9
1d = -7 + -9

Combine like terms: -7 + -9 = -16
1d = -16

Divide each side by '1'.
d = -16

Simplifying
d = -16

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