-21=D+5

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Solution for -21=D+5 equation:


Simplifying
-21 = D + 5

Reorder the terms:
-21 = 5 + D

Solving
-21 = 5 + D

Solving for variable 'D'.

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

Add '-1D' to each side of the equation.
-21 + -1D = 5 + D + -1D

Combine like terms: D + -1D = 0
-21 + -1D = 5 + 0
-21 + -1D = 5

Add '21' to each side of the equation.
-21 + 21 + -1D = 5 + 21

Combine like terms: -21 + 21 = 0
0 + -1D = 5 + 21
-1D = 5 + 21

Combine like terms: 5 + 21 = 26
-1D = 26

Divide each side by '-1'.
D = -26

Simplifying
D = -26

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