8(12-k)=(k+21)

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Solution for 8(12-k)=(k+21) equation:


Simplifying
8(12 + -1k) = (k + 21)
(12 * 8 + -1k * 8) = (k + 21)
(96 + -8k) = (k + 21)

Reorder the terms:
96 + -8k = (21 + k)

Remove parenthesis around (21 + k)
96 + -8k = 21 + k

Solving
96 + -8k = 21 + k

Solving for variable 'k'.

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

Add '-1k' to each side of the equation.
96 + -8k + -1k = 21 + k + -1k

Combine like terms: -8k + -1k = -9k
96 + -9k = 21 + k + -1k

Combine like terms: k + -1k = 0
96 + -9k = 21 + 0
96 + -9k = 21

Add '-96' to each side of the equation.
96 + -96 + -9k = 21 + -96

Combine like terms: 96 + -96 = 0
0 + -9k = 21 + -96
-9k = 21 + -96

Combine like terms: 21 + -96 = -75
-9k = -75

Divide each side by '-9'.
k = 8.333333333

Simplifying
k = 8.333333333

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