-8u+3(u+2)=31

Solution for -8u+3(u+2)=31 equation:

Simplifying
-8u + 3(u + 2) = 31

Reorder the terms:
-8u + 3(2 + u) = 31
-8u + (2 * 3 + u * 3) = 31
-8u + (6 + 3u) = 31

Reorder the terms:
6 + -8u + 3u = 31

Combine like terms: -8u + 3u = -5u
6 + -5u = 31

Solving
6 + -5u = 31

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 + -5u = 31 + -6

Combine like terms: 6 + -6 = 0
0 + -5u = 31 + -6
-5u = 31 + -6

Combine like terms: 31 + -6 = 25
-5u = 25

Divide each side by '-5'.
u = -5

Simplifying
u = -5