4(2k+1)-15=21

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Solution for 4(2k+1)-15=21 equation: 


Simplifying
4(2k + 1) + -15 = 21

Reorder the terms:
4(1 + 2k) + -15 = 21
(1 * 4 + 2k * 4) + -15 = 21
(4 + 8k) + -15 = 21

Reorder the terms:
4 + -15 + 8k = 21

Combine like terms: 4 + -15 = -11
-11 + 8k = 21

Solving
-11 + 8k = 21

Solving for variable 'k'.

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

Add '11' to each side of the equation.
-11 + 11 + 8k = 21 + 11

Combine like terms: -11 + 11 = 0
0 + 8k = 21 + 11
8k = 21 + 11

Combine like terms: 21 + 11 = 32
8k = 32

Divide each side by '8'.
k = 4

Simplifying
k = 4

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