7(1[u-3]1)+3u=19

Solution for 7(1[u-3]1)+3u=19 equation:

Simplifying
7(1[u + -3] * 1) + 3u = 19

Reorder the terms:
7(1[-3 + u] * 1) + 3u = 19

Reorder the terms for easier multiplication:
7(1 * 1[-3 + u]) + 3u = 19

Multiply 1 * 1
7(1[-3 + u]) + 3u = 19
7([-3 * 1 + u * 1]) + 3u = 19
7([-3 + 1u]) + 3u = 19
(-3 * 7 + 1u * 7) + 3u = 19
(-21 + 7u) + 3u = 19

Combine like terms: 7u + 3u = 10u
-21 + 10u = 19

Solving
-21 + 10u = 19

Solving for variable 'u'.

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

Add '21' to each side of the equation.
-21 + 21 + 10u = 19 + 21

Combine like terms: -21 + 21 = 0
0 + 10u = 19 + 21
10u = 19 + 21

Combine like terms: 19 + 21 = 40
10u = 40

Divide each side by '10'.
u = 4

Simplifying
u = 4