42=-7d

Solution for 42=-7d equation:

Simplifying
42 = -7d

Solving
42 = -7d

Solving for variable 'd'.

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

Add '7d' to each side of the equation.
42 + 7d = -7d + 7d

Combine like terms: -7d + 7d = 0
42 + 7d = 0

Add '-42' to each side of the equation.
42 + -42 + 7d = 0 + -42

Combine like terms: 42 + -42 = 0
0 + 7d = 0 + -42
7d = 0 + -42

Combine like terms: 0 + -42 = -42
7d = -42

Divide each side by '7'.
d = -6

Simplifying
d = -6