42=20d+82

Solution for 42=20d+82 equation:

Simplifying
42 = 20d + 82

Reorder the terms:
42 = 82 + 20d

Solving
42 = 82 + 20d

Solving for variable 'd'.

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

Add '-20d' to each side of the equation.
42 + -20d = 82 + 20d + -20d

Combine like terms: 20d + -20d = 0
42 + -20d = 82 + 0
42 + -20d = 82

Add '-42' to each side of the equation.
42 + -42 + -20d = 82 + -42

Combine like terms: 42 + -42 = 0
0 + -20d = 82 + -42
-20d = 82 + -42

Combine like terms: 82 + -42 = 40
-20d = 40

Divide each side by '-20'.
d = -2

Simplifying
d = -2