21-8k=-7(2k+3)

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Solution for 21-8k=-7(2k+3) equation:


Simplifying
21 + -8k = -7(2k + 3)

Reorder the terms:
21 + -8k = -7(3 + 2k)
21 + -8k = (3 * -7 + 2k * -7)
21 + -8k = (-21 + -14k)

Solving
21 + -8k = -21 + -14k

Solving for variable 'k'.

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

Add '14k' to each side of the equation.
21 + -8k + 14k = -21 + -14k + 14k

Combine like terms: -8k + 14k = 6k
21 + 6k = -21 + -14k + 14k

Combine like terms: -14k + 14k = 0
21 + 6k = -21 + 0
21 + 6k = -21

Add '-21' to each side of the equation.
21 + -21 + 6k = -21 + -21

Combine like terms: 21 + -21 = 0
0 + 6k = -21 + -21
6k = -21 + -21

Combine like terms: -21 + -21 = -42
6k = -42

Divide each side by '6'.
k = -7

Simplifying
k = -7

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