42=9k-2k

Solution for 42=9k-2k equation:

Simplifying
42 = 9k + -2k

Combine like terms: 9k + -2k = 7k
42 = 7k

Solving
42 = 7k

Solving for variable 'k'.

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

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

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

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

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

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

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

Simplifying
k = 6