d-99=-2d-9

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Solution for d-99=-2d-9 equation:


Simplifying
d + -99 = -2d + -9

Reorder the terms:
-99 + d = -2d + -9

Reorder the terms:
-99 + d = -9 + -2d

Solving
-99 + d = -9 + -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.
-99 + d + 2d = -9 + -2d + 2d

Combine like terms: d + 2d = 3d
-99 + 3d = -9 + -2d + 2d

Combine like terms: -2d + 2d = 0
-99 + 3d = -9 + 0
-99 + 3d = -9

Add '99' to each side of the equation.
-99 + 99 + 3d = -9 + 99

Combine like terms: -99 + 99 = 0
0 + 3d = -9 + 99
3d = -9 + 99

Combine like terms: -9 + 99 = 90
3d = 90

Divide each side by '3'.
d = 30

Simplifying
d = 30

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