D+12=30

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Solution for D+12=30 equation: 


Simplifying
D + 12 = 30

Reorder the terms:
12 + D = 30

Solving
12 + D = 30

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 = 30 + -12

Combine like terms: 12 + -12 = 0
0 + D = 30 + -12
D = 30 + -12

Combine like terms: 30 + -12 = 18
D = 18

Simplifying
D = 18

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