42=2d+6

Solution for 42=2d+6 equation:

Simplifying
42 = 2d + 6

Reorder the terms:
42 = 6 + 2d

Solving
42 = 6 + 2d

Solving for variable 'd'.

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

Add '-2d' to each side of the equation.
42 + -2d = 6 + 2d + -2d

Combine like terms: 2d + -2d = 0
42 + -2d = 6 + 0
42 + -2d = 6

Add '-42' to each side of the equation.
42 + -42 + -2d = 6 + -42

Combine like terms: 42 + -42 = 0
0 + -2d = 6 + -42
-2d = 6 + -42

Combine like terms: 6 + -42 = -36
-2d = -36

Divide each side by '-2'.
d = 18

Simplifying
d = 18