42=0.25k-3

Solution for 42=0.25k-3 equation:

Simplifying
42 = 0.25k + -3

Reorder the terms:
42 = -3 + 0.25k

Solving
42 = -3 + 0.25k

Solving for variable 'k'.

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

Add '-0.25k' to each side of the equation.
42 + -0.25k = -3 + 0.25k + -0.25k

Combine like terms: 0.25k + -0.25k = 0.00
42 + -0.25k = -3 + 0.00
42 + -0.25k = -3

Add '-42' to each side of the equation.
42 + -42 + -0.25k = -3 + -42

Combine like terms: 42 + -42 = 0
0 + -0.25k = -3 + -42
-0.25k = -3 + -42

Combine like terms: -3 + -42 = -45
-0.25k = -45

Divide each side by '-0.25'.
k = 180

Simplifying
k = 180