8=d-13

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Solution for 8=d-13 equation:


Simplifying
8 = d + -13

Reorder the terms:
8 = -13 + d

Solving
8 = -13 + d

Solving for variable 'd'.

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

Add '-1d' to each side of the equation.
8 + -1d = -13 + d + -1d

Combine like terms: d + -1d = 0
8 + -1d = -13 + 0
8 + -1d = -13

Add '-8' to each side of the equation.
8 + -8 + -1d = -13 + -8

Combine like terms: 8 + -8 = 0
0 + -1d = -13 + -8
-1d = -13 + -8

Combine like terms: -13 + -8 = -21
-1d = -21

Divide each side by '-1'.
d = 21

Simplifying
d = 21

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