21(k-3)=

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Solution for 21(k-3)= equation: 


Simplifying
21(k + -3) = 0

Reorder the terms:
21(-3 + k) = 0
(-3 * 21 + k * 21) = 0
(-63 + 21k) = 0

Solving
-63 + 21k = 0

Solving for variable 'k'.

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

Add '63' to each side of the equation.
-63 + 63 + 21k = 0 + 63

Combine like terms: -63 + 63 = 0
0 + 21k = 0 + 63
21k = 0 + 63

Combine like terms: 0 + 63 = 63
21k = 63

Divide each side by '21'.
k = 3

Simplifying
k = 3

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