15-4k=21

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Solution for 15-4k=21 equation: 


Simplifying
15 + -4k = 21

Solving
15 + -4k = 21

Solving for variable 'k'.

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

Add '-15' to each side of the equation.
15 + -15 + -4k = 21 + -15

Combine like terms: 15 + -15 = 0
0 + -4k = 21 + -15
-4k = 21 + -15

Combine like terms: 21 + -15 = 6
-4k = 6

Divide each side by '-4'.
k = -1.5

Simplifying
k = -1.5

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