3D+8=7D-2D-10

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Solution for 3D+8=7D-2D-10 equation: 


Simplifying
3D + 8 = 7D + -2D + -10

Reorder the terms:
8 + 3D = 7D + -2D + -10

Reorder the terms:
8 + 3D = -10 + 7D + -2D

Combine like terms: 7D + -2D = 5D
8 + 3D = -10 + 5D

Solving
8 + 3D = -10 + 5D

Solving for variable 'D'.

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

Add '-5D' to each side of the equation.
8 + 3D + -5D = -10 + 5D + -5D

Combine like terms: 3D + -5D = -2D
8 + -2D = -10 + 5D + -5D

Combine like terms: 5D + -5D = 0
8 + -2D = -10 + 0
8 + -2D = -10

Add '-8' to each side of the equation.
8 + -8 + -2D = -10 + -8

Combine like terms: 8 + -8 = 0
0 + -2D = -10 + -8
-2D = -10 + -8

Combine like terms: -10 + -8 = -18
-2D = -18

Divide each side by '-2'.
D = 9

Simplifying
D = 9

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