7k-7=-21

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Solution for 7k-7=-21 equation:


Simplifying
7k + -7 = -21

Reorder the terms:
-7 + 7k = -21

Solving
-7 + 7k = -21

Solving for variable 'k'.

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

Add '7' to each side of the equation.
-7 + 7 + 7k = -21 + 7

Combine like terms: -7 + 7 = 0
0 + 7k = -21 + 7
7k = -21 + 7

Combine like terms: -21 + 7 = -14
7k = -14

Divide each side by '7'.
k = -2

Simplifying
k = -2

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