-84=-2k-5(k+7)

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Solution for -84=-2k-5(k+7) equation:


Simplifying
-84 = -2k + -5(k + 7)

Reorder the terms:
-84 = -2k + -5(7 + k)
-84 = -2k + (7 * -5 + k * -5)
-84 = -2k + (-35 + -5k)

Reorder the terms:
-84 = -35 + -2k + -5k

Combine like terms: -2k + -5k = -7k
-84 = -35 + -7k

Solving
-84 = -35 + -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.
-84 + 7k = -35 + -7k + 7k

Combine like terms: -7k + 7k = 0
-84 + 7k = -35 + 0
-84 + 7k = -35

Add '84' to each side of the equation.
-84 + 84 + 7k = -35 + 84

Combine like terms: -84 + 84 = 0
0 + 7k = -35 + 84
7k = -35 + 84

Combine like terms: -35 + 84 = 49
7k = 49

Divide each side by '7'.
k = 7

Simplifying
k = 7

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