21=43+7k

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Solution for 21=43+7k equation:


Simplifying
21 = 43 + 7k

Solving
21 = 43 + 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.
21 + -7k = 43 + 7k + -7k

Combine like terms: 7k + -7k = 0
21 + -7k = 43 + 0
21 + -7k = 43

Add '-21' to each side of the equation.
21 + -21 + -7k = 43 + -21

Combine like terms: 21 + -21 = 0
0 + -7k = 43 + -21
-7k = 43 + -21

Combine like terms: 43 + -21 = 22
-7k = 22

Divide each side by '-7'.
k = -3.142857143

Simplifying
k = -3.142857143

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