u=4(2n+31)+9(n+1)

Solution for u=4(2n+31)+9(n+1) equation:

Simplifying
u = 4(2n + 31) + 9(n + 1)

Reorder the terms:
u = 4(31 + 2n) + 9(n + 1)
u = (31 * 4 + 2n * 4) + 9(n + 1)
u = (124 + 8n) + 9(n + 1)

Reorder the terms:
u = 124 + 8n + 9(1 + n)
u = 124 + 8n + (1 * 9 + n * 9)
u = 124 + 8n + (9 + 9n)

Reorder the terms:
u = 124 + 9 + 8n + 9n

Combine like terms: 124 + 9 = 133
u = 133 + 8n + 9n

Combine like terms: 8n + 9n = 17n
u = 133 + 17n

Solving
u = 133 + 17n

Solving for variable 'u'.

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

Simplifying
u = 133 + 17n