D-1=7

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Solution for D-1=7 equation: 


Simplifying
D + -1 = 7

Reorder the terms:
-1 + D = 7

Solving
-1 + D = 7

Solving for variable 'D'.

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

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

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

Combine like terms: 7 + 1 = 8
D = 8

Simplifying
D = 8

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