12=d-13

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Solution for 12=d-13 equation:


Simplifying
12 = d + -13

Reorder the terms:
12 = -13 + d

Solving
12 = -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.
12 + -1d = -13 + d + -1d

Combine like terms: d + -1d = 0
12 + -1d = -13 + 0
12 + -1d = -13

Add '-12' to each side of the equation.
12 + -12 + -1d = -13 + -12

Combine like terms: 12 + -12 = 0
0 + -1d = -13 + -12
-1d = -13 + -12

Combine like terms: -13 + -12 = -25
-1d = -25

Divide each side by '-1'.
d = 25

Simplifying
d = 25

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