-5u+4+8u=42

Solution for -5u+4+8u=42 equation:

Simplifying
-5u + 4 + 8u = 42

Reorder the terms:
4 + -5u + 8u = 42

Combine like terms: -5u + 8u = 3u
4 + 3u = 42

Solving
4 + 3u = 42

Solving for variable 'u'.

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

Add '-4' to each side of the equation.
4 + -4 + 3u = 42 + -4

Combine like terms: 4 + -4 = 0
0 + 3u = 42 + -4
3u = 42 + -4

Combine like terms: 42 + -4 = 38
3u = 38

Divide each side by '3'.
u = 12.66666667

Simplifying
u = 12.66666667