-90=-6(k+1)

Solution for -90=-6(k+1) equation:

Simplifying
-90 = -6(k + 1)

Reorder the terms:
-90 = -6(1 + k)
-90 = (1 * -6 + k * -6)
-90 = (-6 + -6k)

Solving
-90 = -6 + -6k

Solving for variable 'k'.

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

Add '6k' to each side of the equation.
-90 + 6k = -6 + -6k + 6k

Combine like terms: -6k + 6k = 0
-90 + 6k = -6 + 0
-90 + 6k = -6

Add '90' to each side of the equation.
-90 + 90 + 6k = -6 + 90

Combine like terms: -90 + 90 = 0
0 + 6k = -6 + 90
6k = -6 + 90

Combine like terms: -6 + 90 = 84
6k = 84

Divide each side by '6'.
k = 14

Simplifying
k = 14