u=4(7n+31)+7(n+1)

Solution for u=4(7n+31)+7(n+1) equation:

Simplifying
u = 4(7n + 31) + 7(n + 1)

Reorder the terms:
u = 4(31 + 7n) + 7(n + 1)
u = (31 * 4 + 7n * 4) + 7(n + 1)
u = (124 + 28n) + 7(n + 1)

Reorder the terms:
u = 124 + 28n + 7(1 + n)
u = 124 + 28n + (1 * 7 + n * 7)
u = 124 + 28n + (7 + 7n)

Reorder the terms:
u = 124 + 7 + 28n + 7n

Combine like terms: 124 + 7 = 131
u = 131 + 28n + 7n

Combine like terms: 28n + 7n = 35n
u = 131 + 35n

Solving
u = 131 + 35n

Solving for variable 'u'.

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

Simplifying
u = 131 + 35n