D-15=6

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Solution for D-15=6 equation: 


Simplifying
D + -15 = 6

Reorder the terms:
-15 + D = 6

Solving
-15 + D = 6

Solving for variable 'D'.

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

Add '15' to each side of the equation.
-15 + 15 + D = 6 + 15

Combine like terms: -15 + 15 = 0
0 + D = 6 + 15
D = 6 + 15

Combine like terms: 6 + 15 = 21
D = 21

Simplifying
D = 21

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