3(2+u)-u=6+2(2+1)

Solution for 3(2+u)-u=6+2(2+1) equation:

Simplifying
3(2 + u) + -1u = 6 + 2(2 + 1)
(2 * 3 + u * 3) + -1u = 6 + 2(2 + 1)
(6 + 3u) + -1u = 6 + 2(2 + 1)

Combine like terms: 3u + -1u = 2u
6 + 2u = 6 + 2(2 + 1)

Combine like terms: 2 + 1 = 3
6 + 2u = 6 + 2(3)

Multiply 2 * 3
6 + 2u = 6 + 6

Combine like terms: 6 + 6 = 12
6 + 2u = 12

Solving
6 + 2u = 12

Solving for variable 'u'.

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

Add '-6' to each side of the equation.
6 + -6 + 2u = 12 + -6

Combine like terms: 6 + -6 = 0
0 + 2u = 12 + -6
2u = 12 + -6

Combine like terms: 12 + -6 = 6
2u = 6

Divide each side by '2'.
u = 3

Simplifying
u = 3