-81=-5-4(-1-4k)

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Solution for -81=-5-4(-1-4k) equation:


Simplifying
-81 = -5 + -4(-1 + -4k)
-81 = -5 + (-1 * -4 + -4k * -4)
-81 = -5 + (4 + 16k)

Combine like terms: -5 + 4 = -1
-81 = -1 + 16k

Solving
-81 = -1 + 16k

Solving for variable 'k'.

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

Add '-16k' to each side of the equation.
-81 + -16k = -1 + 16k + -16k

Combine like terms: 16k + -16k = 0
-81 + -16k = -1 + 0
-81 + -16k = -1

Add '81' to each side of the equation.
-81 + 81 + -16k = -1 + 81

Combine like terms: -81 + 81 = 0
0 + -16k = -1 + 81
-16k = -1 + 81

Combine like terms: -1 + 81 = 80
-16k = 80

Divide each side by '-16'.
k = -5

Simplifying
k = -5

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