8[12-k]=3[k+21]

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Solution for 8[12-k]=3[k+21] equation:


Simplifying
8[12 + -1k] = 3[k + 21]
[12 * 8 + -1k * 8] = 3[k + 21]
[96 + -8k] = 3[k + 21]

Reorder the terms:
96 + -8k = 3[21 + k]
96 + -8k = [21 * 3 + k * 3]
96 + -8k = [63 + 3k]

Solving
96 + -8k = 63 + 3k

Solving for variable 'k'.

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

Add '-3k' to each side of the equation.
96 + -8k + -3k = 63 + 3k + -3k

Combine like terms: -8k + -3k = -11k
96 + -11k = 63 + 3k + -3k

Combine like terms: 3k + -3k = 0
96 + -11k = 63 + 0
96 + -11k = 63

Add '-96' to each side of the equation.
96 + -96 + -11k = 63 + -96

Combine like terms: 96 + -96 = 0
0 + -11k = 63 + -96
-11k = 63 + -96

Combine like terms: 63 + -96 = -33
-11k = -33

Divide each side by '-11'.
k = 3

Simplifying
k = 3

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