20-d=19

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Solution for 20-d=19 equation:


Simplifying
20 + -1d = 19

Solving
20 + -1d = 19

Solving for variable 'd'.

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

Add '-20' to each side of the equation.
20 + -20 + -1d = 19 + -20

Combine like terms: 20 + -20 = 0
0 + -1d = 19 + -20
-1d = 19 + -20

Combine like terms: 19 + -20 = -1
-1d = -1

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

Simplifying
d = 1

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