-4.2=-1.2k

Solution for -4.2=-1.2k equation:

Simplifying
-4.2 = -1.2k

Solving
-4.2 = -1.2k

Solving for variable 'k'.

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

Add '1.2k' to each side of the equation.
-4.2 + 1.2k = -1.2k + 1.2k

Combine like terms: -1.2k + 1.2k = 0.0
-4.2 + 1.2k = 0.0

Add '4.2' to each side of the equation.
-4.2 + 4.2 + 1.2k = 0.0 + 4.2

Combine like terms: -4.2 + 4.2 = 0.0
0.0 + 1.2k = 0.0 + 4.2
1.2k = 0.0 + 4.2

Combine like terms: 0.0 + 4.2 = 4.2
1.2k = 4.2

Divide each side by '1.2'.
k = 3.5

Simplifying
k = 3.5