8d-1=-8+9d

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Solution for 8d-1=-8+9d equation:


Simplifying
8d + -1 = -8 + 9d

Reorder the terms:
-1 + 8d = -8 + 9d

Solving
-1 + 8d = -8 + 9d

Solving for variable 'd'.

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

Add '-9d' to each side of the equation.
-1 + 8d + -9d = -8 + 9d + -9d

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

Combine like terms: 9d + -9d = 0
-1 + -1d = -8 + 0
-1 + -1d = -8

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

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

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

Divide each side by '-1'.
d = 7

Simplifying
d = 7

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