8d=7d-1

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Solution for 8d=7d-1 equation: 


Simplifying
8d = 7d + -1

Reorder the terms:
8d = -1 + 7d

Solving
8d = -1 + 7d

Solving for variable 'd'.

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

Add '-7d' to each side of the equation.
8d + -7d = -1 + 7d + -7d

Combine like terms: 8d + -7d = 1d
1d = -1 + 7d + -7d

Combine like terms: 7d + -7d = 0
1d = -1 + 0
1d = -1

Divide each side by '1'.
d = -1

Simplifying
d = -1

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