42=-d+6

Solution for 42=-d+6 equation:

Simplifying
42 = -1d + 6

Reorder the terms:
42 = 6 + -1d

Solving
42 = 6 + -1d

Solving for variable 'd'.

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

Add 'd' to each side of the equation.
42 + d = 6 + -1d + d

Combine like terms: -1d + d = 0
42 + d = 6 + 0
42 + d = 6

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

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

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

Simplifying
d = -36