2[d-1]=8

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Solution for 2[d-1]=8 equation: 


Simplifying
2[d + -1] = 8

Reorder the terms:
2[-1 + d] = 8
[-1 * 2 + d * 2] = 8
[-2 + 2d] = 8

Solving
-2 + 2d = 8

Solving for variable 'd'.

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

Add '2' to each side of the equation.
-2 + 2 + 2d = 8 + 2

Combine like terms: -2 + 2 = 0
0 + 2d = 8 + 2
2d = 8 + 2

Combine like terms: 8 + 2 = 10
2d = 10

Divide each side by '2'.
d = 5

Simplifying
d = 5

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