28-k=7(k-4)

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Solution for 28-k=7(k-4) equation:


Simplifying
28 + -1k = 7(k + -4)

Reorder the terms:
28 + -1k = 7(-4 + k)
28 + -1k = (-4 * 7 + k * 7)
28 + -1k = (-28 + 7k)

Solving
28 + -1k = -28 + 7k

Solving for variable 'k'.

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

Add '-7k' to each side of the equation.
28 + -1k + -7k = -28 + 7k + -7k

Combine like terms: -1k + -7k = -8k
28 + -8k = -28 + 7k + -7k

Combine like terms: 7k + -7k = 0
28 + -8k = -28 + 0
28 + -8k = -28

Add '-28' to each side of the equation.
28 + -28 + -8k = -28 + -28

Combine like terms: 28 + -28 = 0
0 + -8k = -28 + -28
-8k = -28 + -28

Combine like terms: -28 + -28 = -56
-8k = -56

Divide each side by '-8'.
k = 7

Simplifying
k = 7

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