d+8=-1

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Solution for d+8=-1 equation: 


Simplifying
d + 8 = -1

Reorder the terms:
8 + d = -1

Solving
8 + d = -1

Solving for variable 'd'.

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

Add '-8' to each side of the equation.
8 + -8 + d = -1 + -8

Combine like terms: 8 + -8 = 0
0 + d = -1 + -8
d = -1 + -8

Combine like terms: -1 + -8 = -9
d = -9

Simplifying
d = -9

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