7d+d-4D-7d=5d

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Solution for 7d+d-4D-7d=5d equation: 


Simplifying
7d + d + -4D + -7d = 5d

Reorder the terms:
-4D + 7d + d + -7d = 5d

Combine like terms: 7d + d = 8d
-4D + 8d + -7d = 5d

Combine like terms: 8d + -7d = 1d
-4D + 1d = 5d

Solving
-4D + 1d = 5d

Solving for variable 'D'.

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

Add '-1d' to each side of the equation.
-4D + 1d + -1d = 5d + -1d

Combine like terms: 1d + -1d = 0
-4D + 0 = 5d + -1d
-4D = 5d + -1d

Combine like terms: 5d + -1d = 4d
-4D = 4d

Divide each side by '-4'.
D = -1d

Simplifying
D = -1d

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