42=-8k+10

Solution for 42=-8k+10 equation:

Simplifying
42 = -8k + 10

Reorder the terms:
42 = 10 + -8k

Solving
42 = 10 + -8k

Solving for variable 'k'.

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

Add '8k' to each side of the equation.
42 + 8k = 10 + -8k + 8k

Combine like terms: -8k + 8k = 0
42 + 8k = 10 + 0
42 + 8k = 10

Add '-42' to each side of the equation.
42 + -42 + 8k = 10 + -42

Combine like terms: 42 + -42 = 0
0 + 8k = 10 + -42
8k = 10 + -42

Combine like terms: 10 + -42 = -32
8k = -32

Divide each side by '8'.
k = -4

Simplifying
k = -4