81=-d

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Solution for 81=-d equation:


Simplifying
81 = -1d

Solving
81 = -1d

Solving for variable 'd'.

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

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

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

Add '-81' to each side of the equation.
81 + -81 + d = 0 + -81

Combine like terms: 81 + -81 = 0
0 + d = 0 + -81
d = 0 + -81

Combine like terms: 0 + -81 = -81
d = -81

Simplifying
d = -81

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