D+3=15

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Solution for D+3=15 equation: 


Simplifying
D + 3 = 15

Reorder the terms:
3 + D = 15

Solving
3 + D = 15

Solving for variable 'D'.

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

Add '-3' to each side of the equation.
3 + -3 + D = 15 + -3

Combine like terms: 3 + -3 = 0
0 + D = 15 + -3
D = 15 + -3

Combine like terms: 15 + -3 = 12
D = 12

Simplifying
D = 12

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