3(1[2u+5]1)=33

Solution for 3(1[2u+5]1)=33 equation:

Simplifying
3(1[2u + 5] * 1) = 33

Reorder the terms:
3(1[5 + 2u] * 1) = 33

Reorder the terms for easier multiplication:
3(1 * 1[5 + 2u]) = 33

Multiply 1 * 1
3(1[5 + 2u]) = 33
3([5 * 1 + 2u * 1]) = 33
3([5 + 2u]) = 33
(5 * 3 + 2u * 3) = 33
(15 + 6u) = 33

Solving
15 + 6u = 33

Solving for variable 'u'.

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

Add '-15' to each side of the equation.
15 + -15 + 6u = 33 + -15

Combine like terms: 15 + -15 = 0
0 + 6u = 33 + -15
6u = 33 + -15

Combine like terms: 33 + -15 = 18
6u = 18

Divide each side by '6'.
u = 3

Simplifying
u = 3