21+d=-16

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Solution for 21+d=-16 equation: 


Simplifying
21 + d = -16

Solving
21 + d = -16

Solving for variable 'd'.

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

Add '-21' to each side of the equation.
21 + -21 + d = -16 + -21

Combine like terms: 21 + -21 = 0
0 + d = -16 + -21
d = -16 + -21

Combine like terms: -16 + -21 = -37
d = -37

Simplifying
d = -37

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