3k-s=7k-21

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Solution for 3k-s=7k-21 equation:


Simplifying
3k + -1s = 7k + -21

Reorder the terms:
3k + -1s = -21 + 7k

Solving
3k + -1s = -21 + 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.
3k + -7k + -1s = -21 + 7k + -7k

Combine like terms: 3k + -7k = -4k
-4k + -1s = -21 + 7k + -7k

Combine like terms: 7k + -7k = 0
-4k + -1s = -21 + 0
-4k + -1s = -21

Add 's' to each side of the equation.
-4k + -1s + s = -21 + s

Combine like terms: -1s + s = 0
-4k + 0 = -21 + s
-4k = -21 + s

Divide each side by '-4'.
k = 5.25 + -0.25s

Simplifying
k = 5.25 + -0.25s

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