39=d-20

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Solution for 39=d-20 equation:


Simplifying
39 = d + -20

Reorder the terms:
39 = -20 + d

Solving
39 = -20 + 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.
39 + -1d = -20 + d + -1d

Combine like terms: d + -1d = 0
39 + -1d = -20 + 0
39 + -1d = -20

Add '-39' to each side of the equation.
39 + -39 + -1d = -20 + -39

Combine like terms: 39 + -39 = 0
0 + -1d = -20 + -39
-1d = -20 + -39

Combine like terms: -20 + -39 = -59
-1d = -59

Divide each side by '-1'.
d = 59

Simplifying
d = 59

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