D-5=21

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Solution for D-5=21 equation: 


Simplifying
D + -5 = 21

Reorder the terms:
-5 + D = 21

Solving
-5 + D = 21

Solving for variable 'D'.

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

Add '5' to each side of the equation.
-5 + 5 + D = 21 + 5

Combine like terms: -5 + 5 = 0
0 + D = 21 + 5
D = 21 + 5

Combine like terms: 21 + 5 = 26
D = 26

Simplifying
D = 26

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