D+12=15

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Solution for D+12=15 equation: 


Simplifying
D + 12 = 15

Reorder the terms:
12 + D = 15

Solving
12 + D = 15

Solving for variable 'D'.

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

Add '-12' to each side of the equation.
12 + -12 + D = 15 + -12

Combine like terms: 12 + -12 = 0
0 + D = 15 + -12
D = 15 + -12

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

Simplifying
D = 3

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