6(2k+1)-21=21

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Solution for 6(2k+1)-21=21 equation: 


Simplifying
6(2k + 1) + -21 = 21

Reorder the terms:
6(1 + 2k) + -21 = 21
(1 * 6 + 2k * 6) + -21 = 21
(6 + 12k) + -21 = 21

Reorder the terms:
6 + -21 + 12k = 21

Combine like terms: 6 + -21 = -15
-15 + 12k = 21

Solving
-15 + 12k = 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 + 12k = 21 + 15

Combine like terms: -15 + 15 = 0
0 + 12k = 21 + 15
12k = 21 + 15

Combine like terms: 21 + 15 = 36
12k = 36

Divide each side by '12'.
k = 3

Simplifying
k = 3

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