3(u+2)+7u=-4

Solution for 3(u+2)+7u=-4 equation:

Simplifying
3(u + 2) + 7u = -4

Reorder the terms:
3(2 + u) + 7u = -4
(2 * 3 + u * 3) + 7u = -4
(6 + 3u) + 7u = -4

Combine like terms: 3u + 7u = 10u
6 + 10u = -4

Solving
6 + 10u = -4

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 + 10u = -4 + -6

Combine like terms: 6 + -6 = 0
0 + 10u = -4 + -6
10u = -4 + -6

Combine like terms: -4 + -6 = -10
10u = -10

Divide each side by '10'.
u = -1

Simplifying
u = -1