u=5(9n+31)+9(n+1)

Solution for u=5(9n+31)+9(n+1) equation:

Simplifying
u = 5(9n + 31) + 9(n + 1)

Reorder the terms:
u = 5(31 + 9n) + 9(n + 1)
u = (31 * 5 + 9n * 5) + 9(n + 1)
u = (155 + 45n) + 9(n + 1)

Reorder the terms:
u = 155 + 45n + 9(1 + n)
u = 155 + 45n + (1 * 9 + n * 9)
u = 155 + 45n + (9 + 9n)

Reorder the terms:
u = 155 + 9 + 45n + 9n

Combine like terms: 155 + 9 = 164
u = 164 + 45n + 9n

Combine like terms: 45n + 9n = 54n
u = 164 + 54n

Solving
u = 164 + 54n

Solving for variable 'u'.

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

Simplifying
u = 164 + 54n