90=N(n-1)

Solution for 90=N(n-1) equation:

Simplifying
90 = N(n + -1)

Reorder the terms:
90 = N(-1 + n)
90 = (-1 * N + n * N)
90 = (-1N + nN)

Solving
90 = -1N + nN

Solving for variable 'N'.

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

Add 'N' to each side of the equation.
90 + N = -1N + N + nN

Combine like terms: -1N + N = 0
90 + N = 0 + nN
90 + N = nN

Add '-1nN' to each side of the equation.
90 + N + -1nN = nN + -1nN

Combine like terms: nN + -1nN = 0
90 + N + -1nN = 0

Add '-90' to each side of the equation.
90 + N + -90 + -1nN = 0 + -90

Reorder the terms:
90 + -90 + N + -1nN = 0 + -90

Combine like terms: 90 + -90 = 0
0 + N + -1nN = 0 + -90
N + -1nN = 0 + -90

Combine like terms: 0 + -90 = -90
N + -1nN = -90

Reorder the terms:
90 + N + -1nN = -90 + 90

Combine like terms: -90 + 90 = 0
90 + N + -1nN = 0

The solution to this equation could not be determined.