-42+4k=k-3k

Solution for -42+4k=k-3k equation:

Simplifying
-42 + 4k = k + -3k

Combine like terms: k + -3k = -2k
-42 + 4k = -2k

Solving
-42 + 4k = -2k

Solving for variable 'k'.

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

Add '2k' to each side of the equation.
-42 + 4k + 2k = -2k + 2k

Combine like terms: 4k + 2k = 6k
-42 + 6k = -2k + 2k

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

Add '42' to each side of the equation.
-42 + 42 + 6k = 0 + 42

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

Combine like terms: 0 + 42 = 42
6k = 42

Divide each side by '6'.
k = 7

Simplifying
k = 7