d-2=-21

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Solution for d-2=-21 equation: 


Simplifying
d + -2 = -21

Reorder the terms:
-2 + d = -21

Solving
-2 + d = -21

Solving for variable 'd'.

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

Add '2' to each side of the equation.
-2 + 2 + d = -21 + 2

Combine like terms: -2 + 2 = 0
0 + d = -21 + 2
d = -21 + 2

Combine like terms: -21 + 2 = -19
d = -19

Simplifying
d = -19

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