D+4=25

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Solution for D+4=25 equation: 


Simplifying
D + 4 = 25

Reorder the terms:
4 + D = 25

Solving
4 + D = 25

Solving for variable 'D'.

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

Add '-4' to each side of the equation.
4 + -4 + D = 25 + -4

Combine like terms: 4 + -4 = 0
0 + D = 25 + -4
D = 25 + -4

Combine like terms: 25 + -4 = 21
D = 21

Simplifying
D = 21

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